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英语动词有主动和被动两种语态。主动语态表示主语是动作的执行者,又叫施动者;被动语态表示主语是动作的承受者，又叫受动者。区分主动语态和被动语态，主要看主语是执行者还是承受者。如： The flowers and grass should be watered .(____语态) We should water the flowers and grass .(____语态) ◆一 构成 1.被动语态是由“助动词be +过去分词”构成的，助动词be有时态、人称和数的变化。Tom broke the cup .(主动语态) → The cup was broken by Tom .(被动语态) 2.被动语态有以下8种： 一般现在时：be(am / is are) +过去分词 Trees are planted in spring . 一般过去时：be(was / were) +过去分词 The house was built last year . 现在进行时：be(am / is are) + being +过去分词 The car is being repaired . 过去进行时：be(was / were) + being +过去分词 现在完成时：have / has + been +过去分词 The light has been turned off . 过去完成时：had + been +过去分词 一般将来时：will be +过去分词 Lei Feng will be remembered by us forever . 含情态动词的：情态动词+ be +过去分词 My homework can be finished in two hours . 3.被动语态常用于以下场合： ①不知道或没有必要说明动作的执行者是谁时。如：My bike was stolen yesterday .我的自行车昨天被偷了。 ②强调动作的执行者时，使用“by +动作的执行者”。如：The pen was used by my father .这支钢笔是我父亲用过的。 ※ 只有及物动词才有被动形式，不及物动词如rise / come / go / take / place / happen等，没有被动形式。 ◆二 主动语态变被动语态的步骤 通常遵循以下三个步骤： 1. 把主动语态的宾语变成被动语态的主语。 2. 把主动语态的谓语动词变为与其时态相对应的被动形式，且与被动语态的主语保持人称和数的一致。 3. 将主动语态的主语变为介词by的宾语，置于句末。“by +宾语”在句中常省略。 主动语态：Many people speak English . 这里还需要连线! 被动语态：English . is spoken by many people . 如：Lu Xun wrote this book .→ This book was written by Lu Xun .这本书是鲁迅写的。 People are cutting down many trees now .→ Many trees are being cut down now .现在许多树正被砍伐。 (责任编辑：admin) |