初中英語知識點大全？那么，初中英語知識點大全？一起來了解一下吧。
構成形式
基本時態(tài)變化：被動語態(tài)由be + 過去分詞構成，be 隨時態(tài)變化而變化，通常有十種時態(tài)的被動形式。例如：| 時態(tài) | 結構 | 例句 || --- | --- | --- || 一般現(xiàn)在時 | am/is/are + done（過去分詞） | Visitors are requested not to touch the exhibits. || 現(xiàn)在完成時 | has/have been done | All the preparations for the task have been completed, and we're ready to start. || 現(xiàn)在進行時 | am/is/are being done | A new cinema is being built here. || 一般過去時 | was/were done | - || 過去完成時 | had been done | By the end of last year, another new gymnasium had been completed in Beijing. || 過去進行時 | was/were being done | A meeting was being held when I was there. || 一般將來時 | shall/will be done | Hundreds of jobs will be lost if the factory closes. || 過去將來時 | should/would be done | The news would be sent to the soldier's mother as soon as it arrived. || 將來完成時（少用） | shall/will have been done | The project will have been completed before July. |
特殊結構形式
帶情態(tài)動詞的被動結構：情態(tài)動詞 + be + 過去分詞。例：The baby should be taken good care of by the baby - sitter.
雙賓語變被動：有些動詞有兩個賓語，變被動時可把主動結構中的一個賓語變?yōu)橹髡Z，另一賓語保留在謂語后，通常變?yōu)橹髡Z的是間接賓語。例：His mother gave him a present for his birthday. 可改為 He was given a present by his mother for his birthday.
賓語補足語結構變被動：當動詞 + 賓語 + 賓語補足語結構變?yōu)楸粍诱Z態(tài)時，將賓語變?yōu)楸粍咏Y構中的主語，其余不動。例：Someone caught the boy smoking a cigarette. 可改為 The boy was caught smoking a cigarette.
動詞詞組的被動：有些相當于及物動詞的動詞詞組，如動詞 + 介詞，動詞 + 副詞等，也可用于被動結構，但要把它們看作一個整體，其中的介詞或副詞不能省略。例：The meeting is to be put off till Friday.
非謂語動詞的被動語態(tài)：v + ing 形式及不定式 to do 也有被動語態(tài)（一般時態(tài)和完成時態(tài)）。
使用情況
講話者不知道動作的執(zhí)行者或不必說出動作的執(zhí)行者（這時可省 by 短語）。
借助被動的動作突出動作的執(zhí)行者。
為了更好地安排句子。例：The well - known person got on the bus and was immediately recognized by people.（一個主語就夠了）
相關句型：一些表示據(jù)說或相信的動詞如 believe，consider，expect，report，say，suppose，think 等
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