I have to(look after) my grandma at home.用括号中单词的正确形式填空

have to 的意思是不得不 其后接动词原形 这是固定用法
所以：I have to look after my grandma at home.
in time 意思是及时
The doctor arrived in time and saved him.
意思是：医生及时赶到,救了他