!!各位大虾帮帮忙!!

过去时 ：
1，she made a mistake.
她犯了一个错误 。

her 她的 Her friend made a mistake.
hers 她的东西（属于她的）: she has a book == that book is hers
her 她（第三人称单数）：I like her.
herself 她自己（反身代词): she blamed herself that he had made a mistake.=她责怪自己曾犯了一个错误。

2，they made a mistake.
他们犯了一个错误。

their 他们的，their friend made a mistake .

theirs 他们的东西（属于他们的）：they own these books 他们拥有这些书=these books are theirs 这些书属于他们的。

them 他们（ 第三人称复数） ： I like them. 我喜欢他们。

themself 是错的，应该是themselves, 复数（他们自己）
They blamed themselves that they had made a mistake.

he his his him himself
we our ours us ourself
you your yours you youself
单复数同理，其中ourself改成ourselves
you 分为两种，其中复数为yourselves

现在进行时

1,she is playing table tennies now. 她正在打乒乓球。
2，they are playing table tennies now.
......

现在完成时

1,She has already finished her homework. 她已经完成了她的家庭作