Answer:
2. He appears to be playing well.
3. Mike enjoys playing golf on Saturdays.
4. They tend to win home matches.
5. He regrets having missed so many training sessions this season.
6. She claims to have been swimming for an hour.
Step-by-step explanation:
The verbs we need to use in sentences 2, 4, and 6 are "appear", "tend" and "claim". Theses verbs should be followed by the infinitive, that is, a verb preceded by "to". Let's take sentence 2 as an example:
- He is playing well.
The sentence is in the present continuous. We will keep it that way, but using the infinitive "to be" instead of "is":
- He appears to be playing well.
Sentences 3 and 5 require a verb in the -ing form. Just like we did above, we must maintain the verb tense, but use the -ing form of the verb. Let's take sentence 5 as an example:
He is sorry he has missed so many training sessions this season.
The highlighted part above is in the present perfect. We will maintain it in the present perfect, but in the -ing form because of the verb "regret". Thus:
He regrets having missed so many training sessions this season.