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[问][more than的用法有哪些?]
答 1. more than可放在数词之前,意为“超过;不止;以上”,用于此意义时可与over互换使用。
Altogether more than 70 percent of the surface of our planet is covered by water. 整体说来,我们这个星球表面有70%以上都为水所覆盖。
2. more than 可放在名词之前,表示“不只是;不仅仅”。
Hibernation is more than sleep. 冬眠不仅仅是睡眠。
Bamboo is used for more than building. 竹子不只是用于建筑。
3. more than用于形容词或副词前,作“非常;十分”解释,与very同义。
She is more than careful in doing things. 她做事非常细心。
In class, he listens more than attentively. 在课堂上,他听讲十分认真。
4. more than之后接含有can的从句时,常表示否定意义。此时,从句中的谓语动词必须是及物动词,并且与句子的主语呈现逻辑上的动宾关系。
This secret is more than we can let out. 这个秘密我们是不能泄露的。(主语secret是let out的逻辑宾语)
比较: less than 后面接形容词、副词时,意为“不;很少;不到”,具有否定意义。
We were busy and less than delighted to have company that day. 那天我们很忙,不高兴有客人来。
The young man is less than twenty years old. 这个年轻人不到20岁。
[问][when和while有哪些区别?]
答 1. when是at or during the time that, 既指时间点,也可指一段时间;while是during the time that,只指一段时间,因此when引导的时间状语从句中的动词可以是终止性动词,也可以是延续性动词,而while从句中的动词必须是延续性动词。
2. when说明从句的动作和主句的动作可以是同时,也可以是先后发生;while则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。
3. 由when引导的时间状语从句,主句用过去进行时,从句应用一般过去时;如果从句和主句的动作同时发生,两句都用过去进行时的时候,多用while引导。
When the teacher came in, we were talking.
当此句改变主从句的位置时,则为
While we were talking, the teacher came in.
They were singing while we were dancing.
4. when和while 还可作并列连词。when表示“在那时”;while表示“而,却”,表对照关系。
The children were running to move the bag of rice when they heard the sound of a motor bike. 孩子们正要跑过去搬开那袋米,这时他们听到了摩托车的声音。
He is strong while his brother is weak. 他长得很结实,而他弟弟却很瘦弱。
答 1. more than可放在数词之前,意为“超过;不止;以上”,用于此意义时可与over互换使用。
Altogether more than 70 percent of the surface of our planet is covered by water. 整体说来,我们这个星球表面有70%以上都为水所覆盖。
2. more than 可放在名词之前,表示“不只是;不仅仅”。
Hibernation is more than sleep. 冬眠不仅仅是睡眠。
Bamboo is used for more than building. 竹子不只是用于建筑。
3. more than用于形容词或副词前,作“非常;十分”解释,与very同义。
She is more than careful in doing things. 她做事非常细心。
In class, he listens more than attentively. 在课堂上,他听讲十分认真。
4. more than之后接含有can的从句时,常表示否定意义。此时,从句中的谓语动词必须是及物动词,并且与句子的主语呈现逻辑上的动宾关系。
This secret is more than we can let out. 这个秘密我们是不能泄露的。(主语secret是let out的逻辑宾语)
比较: less than 后面接形容词、副词时,意为“不;很少;不到”,具有否定意义。
We were busy and less than delighted to have company that day. 那天我们很忙,不高兴有客人来。
The young man is less than twenty years old. 这个年轻人不到20岁。
[问][when和while有哪些区别?]
答 1. when是at or during the time that, 既指时间点,也可指一段时间;while是during the time that,只指一段时间,因此when引导的时间状语从句中的动词可以是终止性动词,也可以是延续性动词,而while从句中的动词必须是延续性动词。
2. when说明从句的动作和主句的动作可以是同时,也可以是先后发生;while则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。
3. 由when引导的时间状语从句,主句用过去进行时,从句应用一般过去时;如果从句和主句的动作同时发生,两句都用过去进行时的时候,多用while引导。
When the teacher came in, we were talking.
当此句改变主从句的位置时,则为
While we were talking, the teacher came in.
They were singing while we were dancing.
4. when和while 还可作并列连词。when表示“在那时”;while表示“而,却”,表对照关系。
The children were running to move the bag of rice when they heard the sound of a motor bike. 孩子们正要跑过去搬开那袋米,这时他们听到了摩托车的声音。
He is strong while his brother is weak. 他长得很结实,而他弟弟却很瘦弱。