提醒:点这里加小编微信(领取免费资料、获取最新资讯、解决考教师一切疑问!)
我们首先来看宾语从句。① 在及物动词的后面可以接一个名词来充当宾语,如: I knew the man, 而这时也可以用一个句子来充当宾语,如: I knew that he was a good man 这时宾语从句的连接词有 that, (that 只在从句中起联接作用,不在句中充当语法成分,既不是主语也不是宾语,所以在口语中常常被省略。如: I am sure (that) she has passed the exam ②if, whether 它们在宾语从句中只起连接作用,不起语法作用,当作是否讲。从句中有 or not 结构时,要用 whether, 如: I ask him if (whether) he has had his lunch I asks him whether he has had his lunch or not ③ what 它在宾语从句中除了作连接词外,还要作主语或宾语成份,如: I don't understand what you said (what 作 said 的宾语)。又如: I asked him what made him sick (what 在宾语从句中作主语)。④ who,它也和what一样,在句中除作连接词外,可以充当句中的成份,如:I know who she is looking for? ⑤ whose 如: I want to know whose book this is? ⑥ which 如: Do you know which book is mine?
在连接词中还有4个常用的连接副词,① how 它的应用最广,如: how much, how many, how long, how soon, how old …。如: How much does it cost? ② when 它只是连接时间状语,如: Please tell me when the meeting will begin? ③ where 它连接地点状语,如: Where are you from? ④ why 它要连接的是原因状语从句,如: The teacher asked why Tom didn't come to school.
在考试中常见到的考点是: 宾语从句的时态与主句时态的呼应问题。① 主句谓语动词如果是现在时或将来时,宾语从句的时态可以是任何所需要的时态, 如: I know he didn't come. 我知道他没来。 I know he will come tomorrow 我知道他明天来。I know he has gone to London 我知道他已去伦敦了。 ② 主句中的谓语动词若是过去时,宾语从句也要用过去时态中的某一种。比如: 一般过去时,过去进行时,过去将来时,过去完成时。除了在表达宇宙中的客观真理时,不能用现在时态。如: I wanted to know when he would come The teacher told me the earth moves around the sun
状语从句主要有时间状语从句,其连接词有:after, before, when, as, as soon as, until (till), while, since, by其中较难掌握的有以下几点: ① until (till) 直到,在用 until 表达时间状语的句子中,主句中的动词是要十分小心去选择。如动词是持续性动词,它要用肯定句,如: I studied hard until 12 o'clock last night. 如果动词是瞬间截止性动词,则要用否定句,如: He didn't go to bed until his mother came back ② 由since, for, by, before 来引导的时间状语从句。 since 引导的时间状语是动作的开始时间,如: I have studied English since 1990 而由 by 引导的时间状语通常是动作的结束时间,如: I had learned 25 English songs by the end of last term 而before 则多用于完成时, ago 则多用于一般过去时,如: He had finished his work before twelve yesterday I left my hometown two years ago ③ 在状语从句中用一般现在时或一般过去时表示将来。它们可能是主句用一般将来时,从句用一般现在时,如: If it rains, they won't go to the park on Sunday 也可以主句是一般过去时,从句用一般过去进行时,如: He said if it rained the next day he would not go to the park
考试中常见的考点有:要学生区别是条件、时间状语从句还是宾语从句,因在宾语从句中该用什么时态用什么时态,如: I want to know if he will come here tomorrow 在宾语从句中的条件状语从句与主句的关系,如: I want to know if it rains he will come here tomorrow
提醒:点这里加小编微信(领取免费资料、获取最新资讯、解决考教师一切疑问!)