初中所学的句型一般要分为陈述句、疑问句、祈使句和感叹句。 陈述句中有肯定句与否定句之分。其中可以分为以下五种:
① 主语+不及物动词。如:I arrived at six last night.
② 主语+及物动词+宾语,如:I bought a good English Chinese Dictionary yesterday. ③ 主语+及物动词+间接宾语+直接宾语,如:Please tell me a story before I go to bed. 这样可加双宾语的句子有buy,tell, give, ask, pass, teach.
④ 主语+及物动词+宾语+宾语补足语,如:I found it impossible to do it. Please keep the classroom clean and tidy. ⑤ 主语+系动词+表语,如:Tom is an American boy. The grass turned green in spring.在初中常见的句型中有There be…句型,表示存在某种事物,如:There is a map on the wall 其be动词的形式要与其后面相近的那个名词相一致。要注意的是这种句型加入助动词后,也要保持be动词,不要换用have,如:There is going to be a meeting tomorrow. 在句子结构中要注意主谓一致的问题,即句子的主语与谓语动词要相呼应。要注意的有如下几点:
① 用and连接两个主语时一般应视为复数,但如一人身兼两职时则要用单数谓语动词形式,如:A singer and dancer is coming to our party. a singer and dancer 既歌唱又可舞的演员。而 a singer and a dancer 则要译为:一位歌唱家和一位舞蹈家。②有些以 s 结尾的名词谓语动词要用单数,如: The news is good (news 为不可数名词)。
③ 有量词时应按量词的数量计算;如: This pair of glasses is good My glasses are broken. ④有些形单却意为复数的名词,如: People are coming here 这样的词还有 Police, 如果要讲一个警察时,应讲 a policeman。 两个警察为 two policemen。 又如 a policewoman, two policewomen
⑤ 所有不定代词 each, either, neither, one, the other, nobody, nothing, anyone, anything, someone, something … 要作为单数如: Someone is waiting for you 在并列句中表示联合关系的连词有: and not only … but also, neither … nor, either … or 如: My sister and my parents are going to the cinema。 表示转折关系的并列连词有: but 和 yet, 如: She is a good student, but she didn't pass the final exam. 又如: I think the news is strange, yet it is true 表示选择关系的连词有:or, either … or,如: Hurry up, or you will be late for school 表示因果关系的并列连词有: for, so 如: They studied very hard, so they all passed the exam 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
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 原因状语 ① because, 应译为\"因为\"。它表达的因果关系最强,如: He didn't pass the exam because he didn't study hard
② since 应译为\"既然\",如: Since you were ill yesterday I left some notes on your desk ③ as 应译为\"由于\",如: As it is too hot we'd better go swimming since 与 as 所表达的因果关系远比 because 弱得多。而 for 表达的因果关系最弱。它不能用于句首,如: He studies hard, for he wants to go to college 比较状语从句
同级比较 as … as, 如: This book is as good as that one 要注意的有两点:
① as … as 中间要用原级而不是比较级。
② 用形容词还是副词,如: Mary writes as carefully as Tom 而其否定句为 not as (so) … as, 如: They didn't work so hard as we did, 而不同级比较用比较级加 than, 如: He is younger than I am
要注意的是表示\"越来越\"这一概念时有两个句型:
① 比较级+and+比较级,如: The days are getting longer and longer The little girl is becoming more and more beautiful
② 定冠词 the + 比较级+ the + 比较级,如: The harder you study, the more you can learn 方式状语中要注意的是as (连词)与 like (介词)的区别。 as 作为连词其后接从句,如: Please do it as I did it 但后面的句子常作省略,如: Please do it as I 而 like 是介词,其后要接的是宾语,如: Please do it like me 结果和目的状语从句
主要有 so … that, so that, in order that等几种用法。
① so … that 用在单数可数名词前,so + 形容词 + a + 名词 + that,如: She is so beautiful a girl that everyone likes her 或用 such + a + 形容词 + 名词 + that, 如: She is such a beautiful girl that everyone likes her ② 在不可数名词或可数名词复数前只能用 such, 如: It is such good weather we want to go for a picnic 又如: They are such good players that they should win the game. ③ 在much, many, few, little 之前只能用so, 如: I have so little money that I can't buy it
④ so … that 之间只有形容词时,则不能用 such, 如: It is so good that I want to buy ⑤ so that 其后接从句,如: I got up earlier so that I could catch the first bus
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