Unit 12: For and since // When ...? and How long...?

Question 1

For what do we use « for » ?

Answer 1

to say how long something has been happening

exemple:

Ive been waiting for two hours

Question 2

For what do we use « since »?

Answer 2

For what do we use « since »?

start of a period

exemple:

I’ve been waiting since 8 o’clock

Question 3

Is it possible to leave out « for » ?

Answer 3

Is it possible to leave out « for » ?

yes it is possible to leave out « for »

but not in negative sentences

exemple:

They’ve been married (for) ten years.

Tehy haven’t had a holiday for ten years

Question 4

What can we use in negative sentences to replace « for » ?

Answer 4

What can we use in negative sentences to replace « for » ?

« in »

exemple:

They haven’t had a holiday in ten years.

Question 5

What time does apply to the verbs after we use « when »?

Answer 5

What time does apply to the verbs after we use « when »?

past simple

exemple:

When did it start raining

Question 6

What time does we apply for the verbs after we use how long?

Answer 6

What time does we apply for the verbs after we use how long?

present perfect

exemple:

How long has it been raining?