I _____ for half an hour now.

Question:

Ahas been waiting

Bhave been waiting

Cwas waiting

DNone of the above

Answer:

when time word 'for' comes in a sentence present perfect continuous tense is used .

Related Questions:

I _________________ TV since 7 pm. Choose the correct tense form.

I the letter , but I can't find a stamp.

Spot the error:

When I(A)/ gone out(B)/,the sun was shining(C)/No error.(D)