用have to表示:1.arrive at school by eight 2.wash your clothes yourself

【答案】
1.I have to arrive at school by eight.
我得在八点前赶到学校.
2.You have to wash your clothes yourself.
你得自己洗衣服.
3.Don't give him any money.
别给他钱了.
【注意】
have to后面跟动词原形；否定句,把some改为any.