grammar point

[gus]

Hi, could anyone please tell me the grammar point for the following sentences:

I would go if I had the time.
What have you done with your hair?
That sign was just painted.
He could have phoned but I doubt it.
She'll have finished by the time we arrive.

Thanks a million!

[blacknomi]

Hi, could anyone please tell me the grammar point for the following sentences:

I would go if I had the time.
What have you done with your hair?
That sign was just painted.
He could have phoned but I doubt it.
She'll have finished by the time we arrive.

Thanks a million!

1- Past Tense. In real life, I don't have the time so I can't go.
2- Present Perfect Tense. You went to a barbar a few days ago and had someone dyed your hair. I'm dumbstruck when I see that color. I say, "What have you done with your hair?" What you did in the past influences the present.

3. Past Tense/Passive voice.
4. I think he was the anonymous caller last night. I doubt it because I can't remember I gave my number to him before.
5. Future Perfect Tense. She will finish her work before we arrive.