1. The rules for tense usage in the passive are the same as in the active.
Present simple to express habit:
My car is serviced regulary.
Past simple to express a finished action in the past:
Television was invented by John Logie Baird.
Present perfect to express an action wich began in the past and continues to the present:
Diet coke has been made since 1982.
2. The passive infinte (to be + past participle) is used after modal auxiliary verbs and other verbs wich are followed by infinitive.
Driving should be banned in city centers
the house is going to be knocked down.
Present simple to express habit:
My car is serviced regulary.
Past simple to express a finished action in the past:
Television was invented by John Logie Baird.
Present perfect to express an action wich began in the past and continues to the present:
Diet coke has been made since 1982.
2. The passive infinte (to be + past participle) is used after modal auxiliary verbs and other verbs wich are followed by infinitive.
Driving should be banned in city centers
the house is going to be knocked down.
No hay comentarios:
Publicar un comentario