下列句子改为同义句
问题描述：
下列句子改为同义句
1、My parents can only go swimming at the weekend.
On weekdays,my parents aren't ______go swimming.
2、If I finish my homework,I can go out at the weekend.
I can't go out at the weekend______finish my homework.
3、My sister watches more TV than me.
I don't watch TV _______my sister does.
4、My parents suggested going out for a meal.
My parents said,Why _______we go out for a meal?
答
1.able to
2.unless
3.as
4.not