Complete the sentences with the correct form of the verbs in brackets.

1 I forgot ....... (buy) something for dinner, I’m sorry.
2 We regret ....... (tell) you that your application has been unsuccessful.
3 She remembers ....... (watch) her dad leave very early every morning.
4 I’ll try ....... (finish) by lunchtime, but it might take me longer.
5 When they heard the noise, they stopped ....... (eat) their sandwiches and listened.