英语翻译1.他叫我们唱一首英文歌.（ask)2.他的工作是照看他的小弟弟.（主系表）3.李梅数学很好.4.Lily昨天花

1..He asked us to sing an English song.ask sb to do sth 叫某人做某事
2.His task is to look after his little brother.job的意思是【职业,工作】,这里用task比较合适
3.Li mei is good at math.或者Li mei does well in math.
4.It took Lily two hours to read a story yesterday.
5.There are some boys playing basketball in the playground.
或Some boys are playing basketball on the playground.
推荐第一种.
6.Playing sports / Taking exercise every day is very important
7.He has been living in Shanghai for two years.
has/have been doing过去时间里开始、并持续到现在,一直在进行的（或刚结束的）动作或状态.
8.You should understand your parents.
9.Smiling bring others happiness and you will be happy ,too.