Sure! Here are the verbs in the correct infinitive or -ing form:

1. A: You must **be** (be) worried about the race.
B: Not really. I've been training hard so I expect **to win** (win).

2. A: Kate is good at **playing** (play) the guitar, isn't she?
B: Yes. I heard her **playing** (play) in a concert last week. She was great!

3. A: Mike! Could you **let** (let) the dog out?
B: No. Sorry, Mum! I'm busy **helping** (help) Dad at the moment.

4. A: There's no point in **trying** (try) to do these exercises. They're too difficult.
B: You shouldn't **give up** (give up) so easily. Here, let me help you.

5. A: How about **going** (go) to the park?
B: I'd prefer **to stay** (stay) in and **watch** (watch) a DVD.

6. A: Where's Velma? I need **to ask** (ask) her something.
B: She isn't here. She always goes **swimming** (swim) at this time of the day.

7. A: What would you like me **to make** (make) for dinner?
B: Please, don't trouble yourself. Let's **have** (have) a takeaway tonight - my treat!

8. A: Did Sue manage **to get** (get) here early today?
B: Yes, I saw her **working** (work) on her computer as I came in.