I. Use the correct tense-forms of the verbs in brackets. 1. Mike is on a diet now. He (to try) to lose some weight. has 2. David looks very happy. He (to learn to ride a bicycle at last! His dad (to begin) to teach him last year.​

1. Mike is on a diet now. He is trying to lose some weight.

2. David looks very happy. He has learned to ride a bicycle at last! His dad began to teach him last year.