1. 主语是一个单数普通名词、人称代名词或数字,述语动词要用单数形式。
Tom studies hard.
汤姆学习用功。
studies是第三人称单数动词。
I am hungry,she is also hungry.
我饿了,她也饿了。
am是第一人称单数动词, is是第三人称单数动词。
Six is greater than five.
六比五大。
数字six后接单数动词。
2. 主语是两个或两个以上的单数名词且共同表示一个概念,或两者已固定在一起搭配时,述语动词用单数形式。
The mother and servant is preparing breakfast for you.
妈妈兼仆人正在给你们准备早餐。
The writer and professor has won the prize.
作家兼教授赢得了奖励。
3. 当两个或两个以上单数主语由and连接,并用each,every,no等字修饰时,主语在意义上可能是复数,但述语动词必须用单数形式。
No boy and girl likes the new teacher.
没有一个男生和女生喜欢这位新老师。
Each man and woman has their own hobbies.
每一个男人和女人都有自己的爱好。
4. 不定词、动名词、名词片语或名词子句当主语时被看作单数,述语动词用单数形式。
Yeah. Drawing is my cup of tea.
对。画画我拿手。
Swimming is my favorite sport.
游泳是我最喜爱的运动。
Who did the work is unknown.
不知道是谁做的这件工作。
5. 一些单数名词或片语如the United Nations, the United States, news, mathematics, physics等,虽然字尾为s,但述语动词必须用单数形式。
The news that he will come is a good one.
他要来的消息是个好消息。
6. 主语是不定代名词anyone,anybody,anything,someone,somebody,something,no one, nobody,nothing等时,述语动词用单数。
Is there anything for him?
有给他的东西吗?
Nobody likes it.
没有人喜欢它。
7. 主语是一个不可数名词,述语动词一般要用单数形式。
Music is his favorite topic.
音乐是他最喜欢的话题。
8. 主语是两个或多个不可数名词,但已固定搭配在一起时,述语动词要用单数形式。
Bread and milk is wholesome breakfast.
面包和牛奶是有益于健康的早餐。
9.当复数名词表示数量的单一概念时,述语动词用单数形式。
365 days is a year.
365天是一年。
Ten dollars is quite enough.
十美元就足够了。
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