大学英语四六级难不难？要报班吗？

1)在确定的过去时间里所发生的动作或存在的状态。 时间状语有：yesterday, last week, an hour ago, the other day, in 1982等。 Where did you go just now?

2)表示在过去一段时间内，经常性或习惯性的动作。 When I was a child, I often played football in the street. Whenever the Browns went during their visit, they were given a warm welcome.

3)句型： It is time for s b. to do sth "到……时间了" "该……了" It is time s b. did sth. "时间已迟了" "早该……了" It is time for you to go to bed. 你该睡觉了。 It is time you went to bed.你早该睡觉了。 would (had) rather s b. did sth.表示"宁愿某人做某事" I"d rather you came tomorrow.

4) wish, wonder, think, hope 等用过去时，作试探性的询问、请求、建议等。 I thought you might have some. 我以为你想要一些。 比较： 一般过去时表示的动作或状态都已成为过去，现已不复存在。 Christine was an invalid all her life. (含义：她已不在人间。) Christine has been an invalid all her life. (含义：她现在还活着) Mrs. Darby lived in Kentucky for seven years. (含义：达比太太已不再住在肯塔基州。) Mrs. Darby has lived in Kentucky for seven years. ( 含义：现在还住在肯塔基州，有可能指刚离去) 注意： 用过去时表示现在，表示委婉语气。 1)动词want, hope, wonder, think, intend 等。 Did you want anything else? I wondered if you could help me.

1、根据前缀猜测词义

【例一】He fell into a ditch and lay there， semiconscious， for a few minutes.

根据词根conscious(清醒的，有意识的)，结合前缀semi(半，部分的，不完全的)， 我们便可猜出semiconscious词义“半清醒的，半昏迷的”。

【例二】I‘m illiterate about such things.

词根literate意为“有文化修养的，通晓的”，前缀il表示否定，因此illiterate指“一窍不通，不知道的”。

2、根据后缀猜测词义

【例一】Insecticide is applied where it is needed.

后缀cide表示“杀者，杀灭剂”，结合大家熟悉的词根insect(昆虫)，不难猜出insecticide意为“杀虫剂”。

【例二】Then the vapor may change into droplets.

后缀let表示“小的”，词根drop指“滴，滴状物”。将两个意思结合起来，便可推断出droplet词义“小滴，微滴”。

同对比关系相反，比较关系表示意义上的相似关系。

【例】Green loves to talk，and his brothers are similarly loquacious.

该句中副词similarly表明短语loves to talk与生词loquacious之间的比较关系。以此可以推断出loquacious词义为“健谈的”。

表示比较关系的词和短语主要是similarly，like，just as，also等。

在句子或段落种，若两个事物、现象之间构成因果关系，我们可以根据这种逻辑关系推知生词词义。

【例一】Tom is considered an autocratic administrator because he makes decisions without seeking the opinions of others.

根据原因状语从句的内容，我们可以推断出生词autocratic指“独断专行的”。

【例二】There were so many demonstrators in the Red Square that he had to elbow his way through the crowd.

此句为结果状语从句，根据从句的描书“许多示威者”，我们便可推知elbow的词意“挤，挤过”。