Question

Choose the correct option.
Both of them ____ since their childhood.

• A. are working here
• B. work here
• C. have been working
• D. are liking to work

Hint:

“Since + a starting point” signals present perfect continuous tense: “have been working”.

Answer 1

The Correct Option is C

“Since” is one of the clearest grammar signal words in English: whenever a sentence names a specific starting point with “since”, the verb almost always needs to be present perfect (continuous or simple).

1. “Since their childhood” names a starting point in the past that continues up to now.
2. Simple present (“work here”) and present continuous (“are working here”) both describe the present only, without connecting back to that past starting point.
3. “Are liking” is also grammatically awkward, since “like” does not typically take the continuous “-ing” form.
4. “Have been working” is present perfect continuous, the tense built exactly for “an action that started at a point in the past and is still continuing”.

So the correct answer is option C, have been working.