my mother was ill,i have to stay at home中的have to
问题描述：
my mother was ill,i have to stay at home中的have to
my mother was ill,i had to stay at home中的had to 改成must行不行,强调妈妈生病了,我必须在家
答
可以改.但是语感变了.must用于积极的情况多些.碰到消极情况你不得不被耽误的情况要用have to,表示有义务去做同时表示客观上不得不去做.