1. Present perfect with for and since
How long ……..
Know/ best friend
When /meet him/her?

2. Present perfect with for and since
I’ve known my best friend since last January.
I’ve known my best friend for 1 year.
I knew my best friend for ten years.

3. Present perfect with for and since
How long have you known --- best friend
When did you meet him/her?

4. Present perfect with for and since
How long ……………
Have your mobile?
A present?
Or When / buy / it?
How much /cost / it?

5. Present perfect with for and since
How long have you had?
How long did u have that mobile?
Was it a present?
Or When did buy it?
How much did it cost ?

6. Present perfect with for and since
How long ……..
Attend your English course?
When /it / start?

7. Present perfect with for and since
A tablet/ hi-phone/cd
player/ mp3 player?
How long ....have?
When /buy / it?

8. Present perfect with for and since
Have---
How long ……..
When / start riding it?