Answer — Exercise 7
16 - The mother of invention·Outcomes Upper-Intermediate - Student's Book
Întrebare
Read the Grammar box. Then look at the mistakes crossed out in the sentences below. Work in pairs. Discuss how you think each sentence should be corrected and why.
Răspuns
- having to (need -ing form after a preposition)
- let (let is the only possibility as it is not followed by to)
- forced (because made is followed by infinitive without to)
- be able to (can can’t be used after will)
- have been able to (can doesn’t have a past form – present perfect needed with over the last few years)
- to allow us to / to enable us to compete
- were able to (to express ‘can’ in the past)
- had to; made (had to to express ‘must’ in the past; made is followed by the infinitive without to)
- have to (infinitive form to express ‘must’)
- be able to; let (let is the only possibility as it is not followed by to)