can....did..have

Question

Is it correct to say--1)Can you did it?What's the present perfect tense of this sentence--I can do it.I think it will be-- I can have done it.Am I correct??

Mister Micawber · Accepted Answer

sft MIs it correct to say--1)Can you did it?

No. Can you do it?

sft MWhat's the present perfect tense of this sentence-~~I can do it.I think it will be~~ I can have done it.

That is how you would construct it, yes, but it is not in use.

AlpheccaStars · Answer

sft M1)Can you did it?

Can you do it? (ability in the present)
eg.
I need someone to move my piano from the living room to the basement. Can you do it?

Could you have done it? (past ability)
eg.
Last year, I needed someone to move my piano from the living room to the basement. Could you have done it?

Sft M · Answer

You could have done this. It is simple past as you mentioned.

But what will be the present perfect form of "You can do it."?

AlpheccaStars · Answer

sft MBut what will be the present perfect form of "You can do it."?

You could have done it.

Although theoretically, any modal auxiliary can be used in the "modal perfect" form, some are not used, or only rarely used, in practice. "Can" is one of these, because the past form is "could." "Will" is another.

I may do it.
I may have done it.

You should do it.
You should have done it.

You might do it.
You might have done it.

You ought to do it.
You ought to have done it.

You will do it.
You would have done it.

You can do it.
You could have done it.

Sft M · Answer

Thank You!<br/><br/>

can....did..have

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