My sister ----(have)to look after my mother at home todayYou --------(not have)to wear sweaters .It's too hot today

Question

My sister ----(have)to look after my mother at home today
You --------(not have)to wear sweaters .It's too hot today

Answer 1

My sister has to look after my mother at home today
我的妹妹今天必须在家照顾妈妈.
因为my sister 是第三人称单数,故谓语动词要用单数,根据today 用一般过去式
You don't have to wear sweaters .It's too hot today
你不必穿毛衣,今天太热了!
don't have to do = it is unnecessary to do = needn't do 不必做...
祝开心~!