Yes, it is correct to say "could have left."
(eg.)
He could have left at 5:30 instead of at 6:00.
or
She could have left me a note.
You can say "I just got off work."
Wednesday morning, it is correct to say I have not seen him for one day. Wednesday afternoon, or by working day end, it is correct to say I have not seen him for two days
You probably want to say: "Have you had a chance?" In the past, were you given an opportunity to do or try that? You could also say "Did you try it?"
The correct form for this question is, "Did you leave your phone here?" If you are making a statement rather than asking a question, it is correct to say, "You left your phone here."
Technically, you could use retrospect as a verb, but it is not good usage. It would be better to say "I remember."
No but you could say are you up to dance.
Have gone is correct
You can say "I just got off work."
Wednesday morning, it is correct to say I have not seen him for one day. Wednesday afternoon, or by working day end, it is correct to say I have not seen him for two days
It is correct to say could you give me. This can be explained as follows: could is the past form of can but some time it is also used in the present form whenever we want to say to anyone with humble respect then we use could instead of can. For example when we talk to our sir aur teacher ,then we say that could you explain again sir ? here, could is used for humble respect and another example of this ,when we talk to our friend .then ,we just said to her that could you give me water? here could shows that it is a fast form of can.
That is correct. You could also say: Tom has been unemployed for a month.
No, Instead you could say 'the volunteering spirit'
No. But it could be "From New Jersey, I use a cab to go to John's home."
Both are correct and say the same thing. Couldn't is the contracted form of could not.
Right as in right or left: raastRight as in correct: dorost
The latter form is grammatically correct but the former is in popular usage.
You probably want to say: "Have you had a chance?" In the past, were you given an opportunity to do or try that? You could also say "Did you try it?"