一般现在时 & 单三¶
最简单的句子：现在的事实。
小技巧
表达现在的事实: 先主干，再地点，时间放两边。
I am your father.
That is a table.
- 床下有一只大象。
有：There is / There are
There is an elephant under the bed.
- 我们周日从不在桌边吃饭。
We never eat meals at the table on Sundays.
On Sundays,we never eat meals at the table.
- 老师们放学后总是在课桌上跑步。
The teachers always run on the desk after school.
如何表达对否定的事实
It isn't a toilet.它不是个马桶。(am not/ isn't/ aren't)
I don't like eggs.
People don't sing at home in the morning.
如何对事实提问
- Monkeys like kiwi fruit.猴子喜欢猕猴桃。
Do monkeys like kiwi fruit?(前面+do)
- They usually swim here.
Do they usually swim here.
- He is a taecher.
Is he a teacher?(be动词提前)
- The teachers are foodies.
Are the teachers foodies.
- The classroom is clean.
The classroom isn't clean.
Is the classroom clean?
- The boys often wear dresses.
The boys don't often wear dresses.
Do the boys often wear dresses?
The dogs like potatoes. 这些小狗们 喜欢土豆。
- The dog likes potatoes. 这条小狗 喜欢土豆。
名词单复数 + 动词三单,两者均通过是否单三形式双保险区分到底是名词复数还是名词单数
小技巧
当主语是第三人称单数的时候，动词也要用第三人称单数。
单数 |
复数 |
|
|---|---|---|
第一人称 |
I |
we |
第二人称 |
you |
you |
第三人称 |
he, she, it, an apple,... |
they, apples, trees,... |
动词第三人称单数变化规则¶
动词三单：
一般情况下直接加s，如like-likes
以s,x,sh,ch,o结尾，加es.如:do-does, wash-washes
以"辅音字母+y"结尾，变y为i加es，如：fly-flies
不规则变化：have-has
名词复数：
一般情况下直接加s，如like-likes
以s,x,sh,ch,o结尾，加es.如:do-does, wash-washes
以"辅音字母+y"结尾，变y为i加es，如：fly-flies
以"f/fe"结尾，变f/fe为v加es
不规则变化
可以看到两者规则基本相同，仅名词复数多了一条变化规则 以"f/fe"结尾，变f/fe为v加es,更加确定名词复数的s，就是动词三单的s,他们要表达的是一个目的。
The dogs like potatoes.
The dog likes potatoes.
练习¶
The elephant sometimes eats grass.
The elephants sometimes eat grass.
The child eats ice creams in summer.
The children eat ice creams in summer.
He reads books at night.
He desn't read books at night.
Does He read books at night?
备注
虽然所有人称分为单三和三复，毕竟这种分发忽略了第一二人称，因为太少，没必要单列一类，所以将一二人称合并到三复一类中,所以最后就分为两大类：单三和非单三。
综合练习¶
I drink water in the morning.(drink)
Tom goes to school on foot.(go)
They don't know the secret.
Does the teacher always jump in class?