2．派生法(即在词根上加前、后缀记忆)：

en－(使……有)+courage→encourage；inter－(one with another；face to face)+view→interview；foreign+er(人)→foreigner，play+er(执行动作的人)→player，sharpen+er(执行动作的物)→sharpener；library+(y→i)an(人)→li?brarian；miss(v．)+ing→missing(adj．)，probable(adj．)+(l)y→probably(adv．)，sad(adj．)+ly→sadly(adv．)；compose(v．)+(e→i)tion→composition(n．)，inform(v．)+(a)tion→information(n．)

1．合成法：note+book→notebook，school+yard→schoolyard，book+mark→bookmark

构词有法记无定法

5．引导条件状语从句的连词：　 if　 “如果”，引导条件状从，主句用一般将来时，从句则用一般现在时。请区别于if“是否”相当于 whether，引导宾语从句，时态根据语境确定

　 eg:1)I don't know if it ＿＿＿＿ (rain) tomorrow.

　　 2)If it ______ (rain) tomorrow, I _____________ (not climb) the hills.

　　 3)Joan and Mary haven't seen each other_____they left school five years ago.

A.as　 B.before　 C.after　 D.since

4．引导时间状语从句的连词：

　A. when(当…时候)，as soon as…(一…就)，not…until(直到…才)，after(在…之后)，引导的主从复合句，主句为一般将来时，从句则用一般现在时来代替一般将来时。 Eg: I won't leave until he comes back.

　B. since(自从…以来)引导的主从复合句，主句为现在完成时，从句用一般过去时。　 Eg：We haven't met each other since she left here last year.

　C. while(当…时候，一边…一边…)它引导的时间状语从句常用进行时态。　

　 Eg: My father came in while I was doing my homework.　　　　　

3．引导原因状从的有：because (不能与so同时出现在句中)　　　　

2．引导宾语从句的连词

　 陈述句：that 可省略 一般疑问句：if /whether “是否”　　 特殊疑问句：特殊疑问词　　　　　

1．并列连词　　　　 both…and 既~又~谓语用复数动词

　 neither…nor 既不~也不~含否定意义，(就近原则)谓语动词由靠近它的那个主语来决定单复数。　　 either…or…　 “或者 …或者…”“不是…就是…”

　 and“和”　 连接两个并列成分,连接谓语时,两个动词时态应一致。

　 but “但是” 表转折，不能与 though 同时出现在句中。

　 or “或者”在否定句中，并列句中的列举常用 or，而不用 and。　 Eg: I have brothers and sisters.(否)　　　 I don't have brothers or sisters.= I have no brothers and no sisters.　　　　　　　

3．几组易混淆的介词　

　A． “在...之后” in + 一段时间(用于一般将来时)

　 after + 一段时间(用于一般过去时)　 after + 一点时间(常用于一般将来时)　

　 如：The baby stopped crying after half an hour.　

　 The baby will stop crying in half an hour.　 They will visit their teacher after Friday.　　　　　　　　　　

　B． for +一段时间　 since +过去的一点时间

　 这两者均用于现在完成时，具体在时态部分，我会继续向同学们讲解。 　　

　C． be made of "用……制成"　 be made in “由某地制造”be made by somebody “由某人制成”　　　　

　D． in, on, at表时间　　 in “在某月(季节、年)等” eg:in 1996, in January, in summer

　 固定词组：in the morning, in a week,in a minute,in time, in the end

　 on "用于指具体的某一天或专指某一天上午、下午或晚上等"

　 　eg:on Christmas Day, on the night of February 16

　 at “用于具体时刻前和某些固定词组中”

　 固定词组：at seven, at the moment, at night, at last, at first, at noon, at times, at once, at this time of the year, at the beginning of, at the end of this month, at the same time 注意：在表时间里，下列情况下一般不用介词。词组里有：next, last, this, that, tomorrow, yesterday, one, every, all 以及the day before yesterday和the day after tomorrow 前不用介词 。 如:不能说 in tomorrow ,只能说 tomorrow 在明天　　　　

　E. except +宾格/doing something "除…之外” (不包括本身)　

　 Everyone is at school today except Lin Tao. (同义句转换) =Only Lin Tao isn't at school today.　　　　

　F． “用” 通过交通工具 by plane

　 用语言 in English 通过媒介 on /over the telephone,　 on /over the radio,　 on TV

用工具手段 with a pen, with one's hands　　　　　

　G． between “在~和~(两者)之间”

　 between...and...,　 between the two... among 在...之间(三者或三者以上)　

eg.Sue spent over two hours ___ her homework yesterday evening.　 A.on　 B.with　　 C.at　 D.over

2．介词后常用人称代词宾格和动词-ing形式　

　 1)You must take good care of her.　 2)Thank you for teaching us so well.