12 Make sentences in the Present Perfect tense. 0) you / ever / be abroad alone ? Have you ever been abroad alone? 1) I / not buy / my own flat / yet

Solution:

To form sentences in the Present Perfect tense, we use the auxiliary verb 'have' or 'has' followed by the past participle of the main verb.

1. I haven't bought my own flat yet. (Here, 'haven't' is the contracted form of 'have not'. 'Bought' is the past participle of 'buy'.)

Answer: I haven't bought my own flat yet.