Principal clause Subordinate clause

could, might + non-perfect orSubjunctive Moodof the type

or perfect infinitive were, spoke (had been, had spoken)

e.g. He could (might) accompany you there if he were free.

Hecould (might) have accompaniedyou there if hehad been (were) free.

C.1. If the girl were ready, … 2. … the professor might have offered you his help. 3. … if the teacher had explained the new rule. 4. … the man might see you off. 5. If I had been introduced to the man, … 6. He could have rejected the proposal if … 7. Suppose …, the accident might have been avoided. 8. The work could be done without delay, if only … 9. He might come jet if … 10. I could not resist the temptation if …