Present Perfect. Review.

have/has

am/is/are

do/does

did

will

I am slept

I have slept

I did slept

I do sleeping

I will slept

past simple of the verb

verb ending in -ing

verb ending in -ed

past participle form

base form of the verb

I have eaten pizza

I have ate pizza

I have eating pizza

I have eated pizza

I have eat pizza

when the subject is plural

when the subject is singular

when the subject is third person singular

when the subject is third person plural

Everybody has failed the Biology test

Brian and Sue has failed their Biology test

We has failed our Biology test

I has failed my Biology test

at the end of the verbal form

at the beginning of the verbal form

after the subject

after the auxiliary verb

I not have slept at all

I have slept not at all

I have not slept at all

I have slept at all not

change the position of subject and verb in the affirmative sentence

change the position of subject and auxiliary in the affirmative sentence

we add a question mark to the end of the sentence

we change the position of the auxiliary and the verb

Have you turned on the oven?

Have turned you on the oven?

You have turned on the oven?

Turned have you on the oven?