Question

Tap the correct option to form a sentence in the present perfect continuous tense.

'But their numbers _____ over time.'

• A. are declined
• B. have been declining

Answer 1

The correct option is B have been declining

‘Have been declining’ is the correct option, as a sentence in the present perfect continuous tense is formed with the helping verb ‘have’ or ‘has’, followed by the verb ‘been’, and the present participle of the verb ‘decline’, ‘declining’.