英语,改同意句1.being so poor at that time,we did not have enough m

英语,改同意句
1.being so poor at that time,we did not have enough money to buy a tv set.
1.being so poor at that time,we could not()()buy a tv set.
2.we must try to make them not play computer games again.
2.we must try to () them ()()computer games again.
3.my uncle taught history in this school in the past.
3.my uncle ()()()a history teacher in this school