英语
have to 与must的区别：
have to must
说话人的主观意图和要求 由于外部环境、情况、习惯等客观需要
不得不 必须
有时态、人称、数量的变化 没有时态、人称、数量的变化
I must take him to hospital to see the doctor.（主观意愿）
You must treat him as your brother.（要求）
My mother is ill, so I have to stay at home and take care of her.
He has to stay up late because he will take an exam next week.
If you want to be thinner, you will have to take more exercise.
Does he have to finish it in two hours?
He doesn’t have to pay back all the money.
4.arrive,reach与get
reach 是及物动词，后边直接跟宾语，而且后边必须有宾语；arrive和get都是不及物动词。arrive at（小地方）arrive in（大地方），get to .
When will he reach Dalian?
When will he arrive in Dalian ?
When will he get to Dalian?
She gets home early.= She reaches home early.= She arrives home early.
I will phone you if she arrives.
5. His parents grow rice and wheat.他父母种稻子和小麦。
Grow作及物动词，意为 “种植、栽培”
eg.
We grow many flowers in our garden.
The farmer grows corn on his farm.
Grow作不及物动词, 意为 “生长、发育”
eg.
She grows into a beautiful girl.
The crops are growing fast after a heavy rain.
Grow作系动词, 意为 “变得”
eg
It’s growing dark.
She’s growing fatter and fatter.
grow 与plant 区别
grow 指从播种、育苗到田间管理等整个过程，强调人在此期间付出的劳动。
He grows vegetables.
plant 指种子、小苗等植入土中，不强调人的照料。
They plant many trees every year.
6. In the country, he can hear birds singing and sheep bleating.
在农村他能听到鸟在歌唱，羊在叫。
hear 的几种用法
（1）hear sb. doing sth./ hear sb. do sth.
I can hear him reading English.
I often hear him reading English.
与此结构相同的动词还有see
I see the boys playing basketball.
I often see the boys play basketball.
（2）hear of “听说、耳闻”
I hear of him, but I never see him.
（3）hear from =get a letter from
I hear from my parents every month.
7. When they stop, he stops.
Stop doing sth. 停止做某事, 指停止正在做的事
The students stop talking when the teacher comes in.
The baby stops crying and smiling.
Stop to do sth.指停止原来做的事去做另外的事
She was too tired, so she stopped to have a rest.
Jim stopped to pick up the wallet.
8. My job is to feed the animals, too.
job是可数名词a job 一份工作；work 不可数名词a piece of work一份工作
It’s not easy to find a full-time job.
I have a lot of work to do today. Would you please choose another one?
句中的 to feed the animals 是动词不定式短语,在这里作表语.
My wish is to be a teacher.
To see is to believe.
9. Often Katy reads until late last night.
Until 与not … until的用法
Until 可作介词也可作连词，until 用在肯定句中，与持续性动词连用，表示某动作持续到某时
eg.
He waits until I finish school.
We’d better wait until the rain stops.
Not …until与非延续性动词连用，指直到…才
The shop doesn’t open until eight o’clock.
I don’t go to bed until the sun rises.
10. Ji Wei is now with John in America for the summer.
Be with sb. 和某人在一起.
I will be with you again in half a year.
Be with sb. 还表示支持某人
The whole country is with the president.
