beg的用法和辨析

　　Her pale face suggested bad health. 她脸色苍白,看来身体不好.

　　The thought of summer suggests swimming. 一想到夏天就使人们联想到游泳.

　　2)接宾语从句,从句用陈述语气.如:

　　The decision suggested that he might bring his family. 这个决定表明他可以把家属带来.

　　The expression on his face suggested that he was very angry. 他脸上的表情表明他很生气.

　　四、 在主语从句It is suggested that... 及名词suggestion 后面表示具体建议的表语从句、同位语从句都应用should+动词原形,should可以省略.如:

　　It was suggested that we (should) give a performance at the party. 人们建议我们在晚会上表演节目.

be about to do的用法

　　大家见过be about to do sth这个句型吗?有的学生说见过，但是不知道怎么翻译，也不知道怎么用，今天我给大家说一下.

　　◆be about to do sth. 意为“即将做某事”，表达的是一种眼下的，最近的将来。

　　如：I was about to leave when the telephone rang.我正要离开时，电话响了。

　　The plane is about to take off, and we must hurry up.飞机就要起飞了，我们必须快点儿。

　　◆注意 :be about to do sth.不能与表时间的状语连用。

until和by的用法区别

　　1. by表示在某特定的时间之前或不迟于某特定的时间,意为”最迟在;不迟于”或”在……之前”等。如:

　　①I will finish my task by nine.我将在九点钟前完成任务。

　　②The plane takes off at 10:00, so you must try to be at the airport by 9:30.飞机在十点钟起飞,所以你必须在九点半赶到机场。

　　2. until用在肯定句,谓语动词通常是延续性动词,如stand, stay, talk, wait等,表示主句动作终止的时间。如:

　　③I waited until he came back.我一直等到他回来。

　　④The war lasted until 1945.战争持续到1945年。

　　如果用在否定句,谓语动词通常是瞬间性动词,如open, start, leave, arrive, finish, stop等,强调主句动作开始的时间。如:

　　⑤I didn’t leave the boy until his mother turned up.直到这孩子的母亲来,我才离开。

　　⑥The noise of the street didn’t stop until it was midnight.街上的噪音直到半夜才停止。

　　His suggestion was that the debts (should) be paid off first. 他的建议是先把债务还清.

　　The doctors made a suggestion that the new hospital (should) not be set up on the hill. 医生们建议不要把新医院建在山上.

not until的倒装

　　当Not until位于句首时,句子要倒装。

　　其结构为:Not until+从句/表时间的词+助动词+(主句)主语+谓语+…。

　　如:

　　①Not until the teacher came in did the students stop talking.直到老师进来学生们才停止讲话。

　　②Not until next week will the sports meet be held.直到下周才开运动会。