00:01The word do appears a lot in English.
00:06This is because it can be a verb, as in the verb to do,
00:12which can be conjugated as do and does in the present tense,
00:16did in the past tense,
00:20and done as a past participle.
00:24Do can also be an auxiliary verb in the form of do and does
00:31to make questions in the present tense,
00:34and did to make questions in the past tense.
00:39Let's look at each one in more detail.
00:43We will start with the verb to do.
00:48As we have seen,
00:50the verb to do has four forms.
00:55Do, does, did, and done.
01:00Let's look at its form in the simple present tense.
01:05With the verb to do in the present tense,
01:08we say I do, you do, we do, they do,
01:13but we say he does, she does, it does.
01:17Let's look at some example sentences.
01:24I do my laundry on Saturdays.
01:29Do my laundry means I wash my clothes.
01:33Well, I put it in the washing machine.
01:36They do their chores when they arrive home.
01:42Chores are the housework you need to do,
01:45like washing the dishes, doing the vacuuming, etc.
01:51He does nothing all day.
01:55That's right.
01:56He is quite lazy.
01:58He does absolutely nothing.
02:01She does charity work when she has time.
02:06People that do charity work are superheroes.
02:12The simple past tense of do is did for all subjects.
02:19I did, you did, we did, they did, he did, she did, it did.
02:24Notice how there is only one form of the verb in the past tense.
02:30Did.
02:32He did a magic trick.
02:35Yes, and everyone was amazed.
02:38Wow.
02:40The baby did a fart.
02:43Yes, and the smell made everyone cry.
02:46How can such a cute thing produce something so rotten?
02:51I did my homework in record time.
02:55Yes, it only took me five hours instead of ten.
03:01She did ballet after school last year.
03:04This year, she's doing something different.
03:10The past participle of do is done.
03:15Remember that past participles are accompanied
03:19by a conjugation of the verb to have or to be,
03:24which means it is in the correct tense
03:26according to the subject.
03:29In general, have plus past participle
03:33is used with a perfect tense,
03:36and be plus past participle
03:39is with the passive voice.
03:41Let's look at some examples.
03:53These two sentences are in the present perfect tense
03:57because they have
03:58have or has
03:59before the past participle
04:01done.
04:04The video will show you
04:06how it is done.
04:10The report was done on time.
04:14Here, we used a conjugation of the verb to be
04:17before the past participle
04:19done.
04:21The verb to do
04:23can also be used
04:25to replace a verb.
04:28We sometimes use the verb do
04:30to replace a verb
04:32when the meaning is clear
04:34or obvious.
04:36This replacement is more common
04:39in informal spoken English.
04:43Have you done the dishes yet?
04:46Here, done means washed.
04:51I'll do the kitchen
04:52if you do the lawns.
04:55The first do
04:56means clean,
04:58clean the kitchen.
05:00The second do
05:01means
05:02mow,
05:03mow the lawns.
05:06Sometimes do,
05:08does,
05:09and did
05:09are used as auxiliaries
05:12to make questions in English.
05:15Let's start with do
05:16and does.
05:19To make a question
05:20in the simple present tense in English,
05:22we normally put the auxiliary
05:24do
05:25or does
05:26at the beginning
05:27of the question
05:28before the subject.
05:31After the subject
05:32is the verb
05:33in its base form,
05:34which means the infinitive,
05:36without to
05:37at the beginning.
05:40Look at this
05:41affirmative sentence.
05:43You speak English.
05:46How can we make this a question?
05:49We add do
05:51at the beginning,
05:52so it becomes
05:53do you speak English?
05:56You'll see that we add do
05:58at the beginning
06:00when the subject is
06:01I,
06:02you,
06:03we,
06:04or they.
06:05But look at this
06:07affirmative sentence.
06:09He speaks Arabic.
06:11Arabic.
06:12To make this a question,
06:14we say,
06:15does he speak Arabic?
06:18You can see that we add does
06:21at the beginning
06:22when the subject is
06:24he,
06:24she,
06:25or it.
06:27Notice how the letter
06:28S
06:29at the end of the verb
06:31in the affirmative sentence,
06:33because it is in third person,
06:35disappears in the question.
06:37That is because the verb
06:40is in the base form
06:41of the infinitive.
06:43Note,
06:44we don't use
06:46do or does
06:47in questions
06:48that have the verb
06:49to be
06:50or modal verbs
06:52such as
06:52can,
06:53must,
06:53might,
06:53or should.
06:56Let's look at the
06:57auxiliary did.
06:59To make a question
07:01in the simple past tense
07:02in English,
07:03we normally put
07:04the auxiliary did
07:06at the beginning
07:07of the question
07:08before the subject.
07:10And just like
07:11in the present tense,
07:13after the subject
07:14is the verb
07:15in its base form,
07:16which means
07:17the infinitive
07:18without to
07:19at the beginning.
07:21Look at this
07:22affirmative sentence.
07:25You lived
07:25in Spain.
07:27How can we make
07:29this a question?
07:31We add
07:33did
07:33at the beginning,
07:34so it becomes
07:36did
07:37you live
07:38in Spain?
07:39We use
07:40the verb form
07:41live
07:42and not
07:43lived
07:44because the
07:45auxiliary did
07:46shows
07:46that the question
07:47is in the past tense.
07:50Did
07:51is also used
07:52with he,
07:53she,
07:53and it?
07:55So with this
07:56affirmative sentence,
07:58she lived
07:59in Japan,
08:00to make it
08:01a question
08:02in the past tense,
08:03we say,
08:04did
08:05she live
08:06in Japan?
08:08Again,
08:09we use
08:09did
08:10for questions
08:11in the past,
08:12except with
08:13to be
08:13and modal verbs.
08:17compare these
08:19questions.
08:20Do you speak
08:21English?
08:23Did you speak
08:24English?
08:25The only
08:26difference between
08:27a question in the
08:28present tense
08:29and the past tense
08:30is the first part,
08:32do
08:32or did.
08:35And look at these
08:36two questions.
08:38Does
08:39he speak
08:39Italian?
08:41Did
08:41he speak
08:42Italian?
08:44The only
08:45difference between
08:45a question in the
08:46present tense
08:47and the past tense
08:48when it refers
08:49to third person,
08:50he,
08:51she,
08:51and it,
08:52is the first part,
08:54does
08:54or
08:55did.
08:58Look at this
08:59question.
09:00Do
09:01you do
09:02exercises
09:03every day?
09:05Why
09:06are there
09:06two
09:07do's
09:08in this
09:08question?
09:10The first
09:11do
09:12is necessary
09:13because we're
09:14making a
09:15question in the
09:15simple present
09:16tense.
09:18The second
09:19do
09:19is from the
09:20verb
09:21to do.
09:22You do
09:23exercises.
09:25What happens
09:26if instead
09:27of you
09:28we're
09:29asking about
09:30another
09:30person.
09:33Does
09:33she do
09:34exercises
09:35every day?
09:37We use
09:38does
09:39because
09:40it is
09:41necessary
09:41for simple
09:42present tense
09:43questions
09:43for third
09:44person.
09:45In this
09:46case,
09:46for
09:47she.
09:48Does
09:48she.
09:50Again,
09:51do
09:51appears
09:52because
09:53you do
09:54exercises.
09:55exercises.
09:56It appears
09:57as do
09:58and not
09:59does
10:00because the
10:01verb needs
10:02to be in
10:03the base
10:03form of
10:04the infinitive.
10:06Of course,
10:07in the past tense,
10:08you would say,
10:09did you do
10:11exercises
10:11yesterday?
10:14Did
10:14is an auxiliary
10:16which is
10:17needed to
10:17make a
10:18question.
10:19Do
10:20is from
10:21the verb
10:21to do.
10:24Do
10:25and does
10:26for
10:26emphasis.
10:29Sometimes
10:30do,
10:30does,
10:31and did
10:32are used
10:33in positive
10:34sentences
10:34to give
10:35special
10:36emphasis
10:37that what
10:38you say
10:39is true
10:39despite
10:40what the
10:41other person
10:42thinks.
10:43note
10:44that when
10:45speaking,
10:46the word
10:46do,
10:47does,
10:47or did
10:47is
10:48stressed.
10:50I do
10:51want to
10:52go.
10:53We put
10:54stress
10:54on the
10:55word
10:55do
10:55to
10:56emphasize
10:57that we
10:58really
10:58want to
10:58go,
10:59even
10:59if you
11:00think
11:00it is
11:00not
11:01true.
11:03I did
11:04study
11:05for the
11:05test.
11:07Contrary
11:07to what
11:08you may
11:08believe,
11:09yes,
11:09I
11:09studied.
11:11Notice
11:12that did
11:12is used
11:13for
11:14positive
11:14sentences
11:15in the
11:15past tense
11:16and that
11:17the main
11:17verb
11:18is in
11:18its
11:19base
11:19form.
11:21Yes,
11:22he does
11:22like
11:23broccoli.
11:24You may
11:25be surprised
11:26but yes,
11:26he likes
11:27broccoli.
11:29You do
11:30need tickets
11:31for the
11:31event.
11:33I am
11:33emphasizing
11:34the fact
11:35that tickets
11:36are needed
11:37despite
11:37what you
11:37think.
11:39you may
11:40also be
11:41interested
11:41in our
11:42lesson
11:42about the
11:43difference
11:43between
11:44do
11:44and
11:45make.
11:46So have
11:46a look
11:46at that.
11:48I hope
11:49you found
11:49this lesson
11:50about the
11:50difference
11:51between
11:51do,
11:52does,
11:52did,
11:53and done
11:53useful.
11:54If you
11:55did,
11:56click like
11:56and subscribe
11:58to our
11:58channel so
11:59you know
12:00when we
12:00create new
12:01videos to
12:02help you
12:02improve your
12:03English.
12:04Have an
12:04awesome day!
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