高中英语 知识点大全87 no longer.doc

高中英语知识点大全（87）：no longer 1、no longerno longer常可相当于notany longer. not 用来否定谓语, any longer 置于句末。上面的句子可分别改作:he dont live here any longer.dont worry about her. after all she isnt a child any longer.i shall not wait any longer.注意：no more（相当于notany more）也是“不再”的意思。no longer是把现在的情况和过去对比，时态以现在时为多，有时也用过去时或将来时；no more 指今后如何，通常用将来时态。i can no longer stand it. 我再也受不了。i will go there no more. 我再也不到那地方去了。美国人有时用起来比较随便。he is no more/no longer ill.他的病好了。另外：涉及数量或程度时要用no more; 谈到时间表示once but not now（有一度、曾经那样，但现在不了时），要用no longer.there is no more bread. 没有面包了。i no longer support the conservative party. 我不再支持保守党了。（曾经支持过）no more than:only 仅仅；只有。具有感情色彩，强调“少”。与no less than 相对。not more than:less than;at most 不到；至多。说明客观事实。与not less than相对。he has no more than 20 yuan. 他只有20元钱。（强调钱“少”）he has not more than 20 yuan. 他有不到20元钱。（说明客观事实）no less than 50 people attended the meeting. 参加会议的人不少于50多个。（强调“多”）not less than 50 people attended the meeting. 参加会议的有50多人。（说明客观事实）注意：no用于比较级之前总含有感情色彩；not用来否定比较级则只说明客观事实。you are no taller than i. 你并不比我高。（我们两人都矮）you are not taller than i. 你不如我高。this question is no more diffcult than that one. 这个问题并水比那个（容易的）问题难。this question is not more diffcult than that one. 这个问题不如那个问题难。2、no more than/not more than/no more.than/not more.thanno more than 意为“仅仅、只不过”，相当于only。它与数字连用时，意为“仅仅至多”，强调“少”，带有说话者的感情色彩。如：i am no more than a teacher. 我只是个教师而已。there were no more than two hospitals in this city before liberation.解放前，这座城市里只有两家医院（表示很少）not more than 后面接数词时，表示“不超过、最多”的意思。用来说明情况，并含有“少”之意，也不带有说话者的主观色彩。如：there are not more than ten minutes left. 最多只剩下10分钟了。（表示客观事实）“no more+形容词（副词）原级+than”意为“两者同样不”，前面和后面同时否定，带有感情色彩。如:this tool is no more useful than that one.这件工具与那件工具一样没有用。（两者都没有用）“not more+形容词（副词）原级than”意为“不比更”。这是比较级的正规用法，表示比较的事实，两者都肯定。如：his tool is not more useful than one. 这样工具不及那件工具有用。（两者都有用）3、must + have + 过去分词表示推测过去某动作“一定发生了”。如：they quarrelled quite often and wh