【正文】
ot until the teacher came did he finish his homework. 直到老師來,他才完成作業(yè)。二、否定詞置于句首,句子應進行倒裝。省略多見于非正式文體,尤其在對話中,省略是一種普遍的現象。We are to teach the freshmen. 我們要教新生。1) be +現在分詞,構成進行時態(tài)。3) 構成否定祈使句。例如:I have been studying English for ten years. 我一直在學英語,已達十年之久。2)have + been +現在分詞,構成完成進行時。In the past, many students did not know the importance of English.過去,好多學生不知道英語的重要性。I do miss you. 我確實想你。例如:He is to go to New York next week.. 他下周要去紐約。例如:We are to meet at the school gate at seven tomorrow morning. 我們明天早晨7點在校門口集合。Here is your letter. 你的信。No sooner had she gone out than the phone rang. 她剛離開,電話就響了。it做形式主語,不定式放在謂語動詞之后常用于下列結構中:(1)It is/was +adj.+of sb. to do…(2) It is +adj.+for sb.+to do…It is easy / difficult / hard / foolish / unwise / right / wrong / unnecessary(3) it is +a +名詞+ to do...It is a pity / a pleasure / a pleasant thing / one’s duty / an honor / a shame / a crime / no easy job… t