1. if 引導(dǎo)的虛擬語(yǔ)氣2. 倒裝形式Were I you (=if I were you) , I would get up early in the morning.Had you arriv... [查看全文]
實(shí)例練習(xí)長(zhǎng)句: eg. Yale professor and Harvard Hughes Medical Institute investigator Tian Xu directs a research cent... [查看全文]
全部否定和部分否定 eg. All the birds can not fly. Not all the birds can fly. 不是所有的鳥都會(huì)飛?! ?. 部分否... [查看全文]
在以as, than, when, if, unless等引導(dǎo)的從句中的省略: 在有些狀語(yǔ)從句中,如果謂語(yǔ)包含有動(dòng)詞be,主語(yǔ)又和主句的主語(yǔ)一致a),或者主語(yǔ)是... [查看全文]
1) 當(dāng)let后只有一個(gè)單音節(jié)動(dòng)詞,變被動(dòng)語(yǔ)態(tài)時(shí),可用不帶to 的不定式。They let the strange go.---> The strange was let go. ... [查看全文]
一、可以用作介詞⒈)指時(shí)間上早于,在……之前,如:She has lived here since before the war.她從戰(zhàn)前就一直在這兒住。⒉)指位置... [查看全文]
一、用作及物動(dòng)詞1. 意為"保存;保留;保持;保守"。如:Could you keep these letters for me, please? 你能替我保存這些信嗎?I'... [查看全文]
表示義務(wù)、意圖或建議:必須,應(yīng)該I must leave at six today. 我今天必須六點(diǎn)鐘離開。I must write a letter to the head t... [查看全文]
動(dòng)詞suggest有如下一些用法一、 有"建議"的意思.advise, propose 也有此義,請(qǐng)比較它們用法的異同:1) 都可接名詞作賓語(yǔ)She suggested ... [查看全文]
1) 兩詞都是'必須'的意思,have to 表示客觀的需要, must 表示說(shuō)話人主觀上的看法,既主觀上的必要。My brother was very... [查看全文]