人教必修1·第1单元·重难点详解(24)■本站特约作者 何素秀 供稿　　47. 特殊疑问句的疑问词前可用介词吗?【教材原句】About how long had Anne and her family been in the hiding place when she wrote this part of her diary? (p. 3)译文：当安妮写这篇日记的时候，她和她的家人在这个藏身之处大约呆了多长时间？　　【用法说明】如果语义需要，特殊疑问句的疑问词前可以使用介词。如：On what do you base your theory? 你的理论依据是什么? About how long did you stay in Paris? 你在巴黎大约待了多久？Since whenhave you become active? 你什么时候开始变得积极了?In which hall will the recital be given? 独唱会在哪个厅里举行呢?To what extent would you trust them? 你对他们的信任到何种程度?For what purposedid you invite me to come here? 你们请我到这里来是为了什么目的? 　　48. Why do you think… 还是 Do you think why…?【教材原句】Why do you think her feelings changed towards nature? (p. 3)译文：你认为她对大自然感觉的改变是出于什么原因？【用法说明】英语习惯上说 Why do you think…，但不说 Do you think why…。请先看以下两句：Why do you think he is ill? 你为什么认为他病了？Do you know why is ill? 你知道他为什么病了吗？上面第一句为特殊疑问句，第二句为一般疑问句，但是如果倒过来说成下面这样的句子，则是错的：误：Do you think why he is ill? 误：Why do you know he is ill?要弄清这个问题，我们作以下分析：　　如果一个问题可以用 yes 或 no 回答，那么我们就用一般疑问句的形式(疑问词放在句中，即主句之后)，适合这类句型的主句动词通常有 know, hear, ask, tell 等。如：Did you ask why he had left so soon? 你问过他为什么那么快就离开了吗？如果一个问题不能用 yes 或 no 回答，我们就用特殊疑问句的形式(疑问词放在句首)，适合这类句型的主句动词通常有 think, believe, suppose, guess, say 等。如：　　Where do you suppose he has gone? 你认为他去什么地方了？　　What did you say his name was? 你刚才说他的名字是什么?　　Who do you suppose would believe that story? 你想谁会相信那一套话呢?　　What do you think his motives were in buying the director a drink? 你认为他请董事喝酒的动机是什么？　　但有时同一个动词，用两种形式的疑问句都可以，但是意思不同。如：　　How do you knowhe became ill? 你怎么知道他病倒了？Do you know howhe became ill? 你知道他是怎么病倒的吗？　　 说明:引用此文请注明出处,并请保留该文章链接地址,谢谢~~