Since vs For

10. He has been doing his homework …………… .. 4 o’clock.

• SINCE

• FOR

2. He has been suffering from fever ………………. Monday.

• FOR

• SINCE

My father has been serving in the army …………….. 20 years.

• FOR

• SINCE

It has been raining heavily …………….. last night.

• SINCE

• FOR

6. I have been teaching in this college ……………. 10 years.

• FOR

• SCINCE

The masons have been building this house ………………. last March.

• SINCE

• FOR

9. A cold breeze has been blowing ……………….. yesterday.

• FOR

• SCINCE

I haven’t seen her ---- two days.

• FOR

• SCINCE

Sue has only been waiting _______ 20 minutes.

• since

• for

Tim and Tina have been learning English _______ six years.

• since

• for