at home 和 in one’s home 的区别
at home 和 in one’s home 都意为“在家”。如果用at ,在 home 前不能用其他词语；如果用in ,在home 前必须用相应的形容词性物主代词。
eg : People will have robots in their home. They’ll study at home on computer. I always study in my home on Sunday. = I always study at home on Sunday.
练习：1.My brother often watches TV ____ _____ home.
A. at his B.in his C.in my D.in her
2.His sister usually does _____ homework in _____ home. A.her;his B.her;her C./;his D.her;/
3.We don’t do our homework _____ home on Monday. A.in our B.in my C.at D.A and C
解析：1.B A项中at home中间不能加形容词性物主代词，排除A；Ｃ、Ｄ两项介词ｉｎ后的形容词性物主代词与ｍy brother不对应，所以排除；只有B项是正确的。
2. B do one’s homework “做家庭作业”，in one’s home“在家”是固定搭配，主语his sister=she 。所以，形容词性物主代词均用her。
3.D 此句中in our home = at home ,所以D项正确。