Form of the passive

Passives can be formed in the following ways:

1 A tense of be f> 10.6-14] + past participle: active: He cooks/has cooked/will cook the food He is/was cooking the food passive: The food is/has been/will be + cooked The food is/was being + cooked

2 Modal [> 11.1] + be/have been + past participle: active: He may cook/may have cooked the food passive: The food may be/have been + cooked

3 Infinitive [> 16.2]: to be/ta have been + past participle: active: He is/was to cook the food passive: The food is to be/was to have been + cooked

4 -ing form [> 16.41]: being/having been + past participle: active: Cooking/Having cooked passive: Being/Having been + cooked