初一至初三全程英語知識點總結及練習1
ⅳ. either 用于否定句中,常置于句末。在肯定句變否定句時,其中的also, too, as well都要改為either.
① yesterday i didn’t watch tv and i didn’t see the film, either .昨天我沒有看電視,也沒有看電影。
§28 for / from / since
ⅰ. 三者都能用來表示時間,但用法不同。
since “自從”,所表示的是一個時間點。可用作介詞,也可用作連詞,后接時間名詞或短語,或引導時間狀語從句;要求前面的謂語動詞或主句的謂語動詞必須用完成時態,要用延續性動詞。而since引導的從句中的謂語動詞通常應是短暫性的動詞。若接時間,則應為點時間。如:
① he has worked there since1989.
② she has lived here since she moved here.
ⅱ. from “自從” 只用作介詞,表一個事情的開始點,可用于過去、現在或將來的時態。如:
① they worked from 7:00 to 12:00 this morning.
② we have been good friends from childhood.
ⅲ. for 作為介詞,后面接段時間,用于完成時、現在時、過去時和將來時,句中要用延續性動詞。如:
① we’ll stay here for ten minutes.我們將在這兒呆10分鐘。
② they have studied english for three yeas.
§29 although/ though
ⅰ. although conj. “盡管、雖然”引導讓步狀語從句,相當于 though. 只是比though稍微正式些。多用于句首。though 用于非正式文體中,較普遍,但以下幾種用法,不能用although. 如:
① 表強調時,要用even though,如:
even though i didn’t understand a word, i kept smiling.盡管我一字不識,我還是一直微笑著。
②. though可用在倒裝句中,如:
young though he is, he is quite experienced. 他雖然年輕,但很有經驗。
③ though 可作副詞,表示“然而”放在句末或其它位置。如:he said he would come, he didn’t though.他說他要來,結果他卻沒來。
[此外],although不用著副詞。在英語中如果用了although 或 though, 就不能再有but,但可以用yet 或still; 反之,如果用了but , 就不能用although 和 though. 如:
① although he is in poor health, (yet) he works hard. = he is in poor health, but he works hard. 雖然他身體不好,但他工作仍努力。
②although it was so cold, he went out without an overcoat.雖然天氣很冷,他未穿外衣就出去了。
③ he is quite strong, although very old. 他雖然很老了,但還是十分健壯。
ⅱ. though 常用作連詞,“雖然”。在口語中還用著副詞,一般放在句末,意為“可是、然而”等。如:
① he didn’t light the fire, though it was cold. 天氣雖很冷,他卻還沒生火。
② though it was very late, he went on working. 雖然很晚了,他還是繼續工作。
③ he said he would come, he didn’t, though. 他說他來,可是結果他沒有來。
§30 always / yet
ⅰ. always “總是;一直”常與一般現在時連用。有時也與進行時連用, 但并不強調動作正在進行,而是表示“贊嘆、厭煩、不滿”等情緒。常用于肯定句中,放在“三類詞”(情態動詞、助動詞、系動詞本書稱為“三類詞”)之后,行為動詞之前。如: