module4unit3grammarandusage(nx)(已修改)
2024-12-04 01:38 本頁面
【正文】 Look at the following sentences. Point out the verb, the subject and the object in each of these sentences and change them into passive voice. We keep food in the fridge. The boy broke the glass. You must close the windows and the door. Food is kept in the fridge. The glass was broken by the boy. The windows and the door must be closed. What’s the difference between active voice and passive voice? Tense The active voice The passive voice The simple present do/does am/is/are done The present continuous am/is/are doing am/is/are being done The present perfect has/have done has/have been done The simple future be going to/will do be going to/will be done The simple past did was/were done The past continuous was/were doing was/were being done The past perfect had done had been done Point 1 Usually the doer of the action needn’t be mentioned in the passive sentence, but if it is needed, we use by to introduce the doer of the action. For example, How can it be used in other ways? ( It is difficult to say who the doer is.) Upon reaching the top of the mountain, a feeling of happiness and a sense of achievement will be experienced. ( It is not necessary to mention the doer.) Point 2 When a verb is followed by two objects, either of the objects can be used as the subject in the passive sentence. However, you should know the difference between using the person and the thing as the subject. For example: Our teacher often tells us some interesting stories in English.→ We are often told some interesting stories in English. Some interesting stories are often told to us in English. My friends gave me some nice presents on my birthday.→ I was given some nice presents on my birthday by my friends. Some nice presents were given to me on my birthday by my friends. My mother will make us a cake this Saturday.→ We will be made a cake by my mother this Saturday. A cake will be made for us by my mother this Saturday. Point 3 When an infinitive is used as an object plement after some verbs, such as make, let,notice, observe,see, watch, or hear, in the active voice, the infinitive maker to should be omitted,but if the sentence is changed into the passive voice, to should be used before the infinitive. More examples: I often hear the girl play the piano in the afternoon.→ The girl is often heard to play the piano in the afternoon. The teacher makes his students write a position every week.→ The students are
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