初一至初三全程英語知識點總結及練習(初三年級(上))
10. keep doing/ keep on doing
(1) keep doing指的是連續地、堅持不斷地做某事,中間不間斷。 例如:it kept blowing for a whole day.刮了一整天風了。the temperature keeps dropping.溫度持續下降。
(2) keep on doing是指反復堅持做某事,但動作之間略有間隔。例如:they have kept on writing to each other for many years.他們已經互相通信多年了。after drinking some water, he kept on talking.喝了一些水后,他堅持講話。
11. seem/ look
(1) seem一般著重于以客觀跡象為依據,意思是“似乎、好象、看起來…”。 例如:the baby seems to be happy.嬰兒看上去似乎很高興。he seemed to be sorry for that.他似乎為那件事感到抱歉。
seem能與to do結構連用,而look不能。 例如:it seems to rain. 似乎要下雨了。
they seemed to have finished their work.他們似乎已經完成了工作。
在it作形式主語的句型中只能用seem。 例如:it seems that he is quite busy now.他現在看起來很忙。
it seems to us that there is nothing serious.在我看來沒什么大不了的。
(2) look用作“看起來;好像”時,常從物體的外觀或樣貌上來判斷,是以視覺所接受的印象為依據的。
例如:the room looks clean.這間房看起來很干凈。the girl looks like her mother.那女孩看起來向她的媽媽。
12. such/ so
(1)such常用作形容詞,用來修飾名詞。 例如:don’t be such a fool.別這么傻。
he is such a clever boy.他是如此聰明的一個男孩。
(2) so是副詞,用來修飾形容詞或副詞。 例如:he is so kind! 他真好心!
why did you come so late? 你為何回來得如此晚?
當名詞前有many, much, few, little等表示多、少時,應該用so。
例如:he has so many friends.他有如此多的朋友。 only so little time is left! 才剩這么一點兒時間!
13. either/ too/ also
(1)either用作“也”時是副詞,常用于否定句句尾。
例如:she is not a japanese, i’m not, either.她不是日本人,我也不是。
my sister doesn’t like this song, either.我妹妹也不喜歡這首歌。
(2)too常用于肯定句或疑問句尾,表示“也”。
例如:he likes china, too.他也喜歡中國。 are you in grade 3, too? 你也在三年級嗎?
(3)also也常用于肯定句或疑問句,但一般位于句中。
例如:we are also students.我們也是學生。 he also went there on foot.他也是走著去的。
did you also want to have a look? 你也想看看嗎?
14. if/ whether
在下列情況下只能用whether而非if:
(1)與or not連用時,只能用whether.
we want to know whether you are ill or not. 我們想知道你是否生病了。
please tell me whether or not you have finished your work.請告訴我們你是否完成了工作。
(2)后接動詞不定式時,只能用whether.
adam didn’t know whether to go or stay.亞當不知道是走還是留。
he hasn’t decided whether to have dinner with me.他還沒決定是否和我共進晚餐。
(3)所引導的賓語從句放在主句之前時,只能用whether.