Question

Jackson and kate _____ all this time. ( choose correct tense) options are:- a. have been collaborating. b. have to collaborate c. collaborate d. collaborates​

Answer 1

Answer:

have been collaborating

Explanation:

all this time refers to the past till present

so option a is correct

Answer 2

Answer:

Jackson and Kate have been collaborating all this time.

Explanation :

• All this time is refering here present perfect continuous tense, therefore have been collaborating is right for the blank space.

• Structure ( affirmative ) : Subject + auxiliary verb ( have been / has been ) + main verb + ing + object / complement : He has been reading this novel for four hours.

• Here 'Jackson and Kate' is subject, have been is helping verb, collaborating ( collaborate + ing = collaborating ) is main verb and 'all this time' is object or complement. Jackson and Kate say they are plural numbers ( more than one ), that's why 'have been' has been used as a helping verb.

• Example : He has been writing an email.