Exercise: present perfect continuous - for, since.

1) I've been waiting for this bus half past nine.

2) The company have been selling snacks over six months.

3) Mary has been working freelance she lost her office job.

4) I've been studying English grammar early this morning and I still don't understand it very well.

5) It's been raining last Wednesday!

6) That strange man has been standing on the corner nearly two hours.

7) I've been having problems with these glasses I bought them last week.

8) John has been seeing Mary again about a week.

9) Sorry! How long have you been waiting ?

10) I've wanted to speak to you quite a long time.