zdania twierdzące:
Pollutions is a serious problem, you have made it worse.
Yes, I have.
I've paid attention to Alfie and Ella at Save the Sea.
I've read their report.
Yes, he has.
He has taken the recycling out.
I've put a recycling box next to the door for him.
I've sent ten emails, I've forwared five emails, I've deleted about 20 emails, I've done some searches.
Yes, I have.
zdania przeczące:
No, he hasn't.
No, I haven't.
zdania pytające:
Have you decided about our community work?
Have you heard the news?
Has Dave arrived?
Has Dan arrived?
Have you installed the new program?
Have you installed the program?
