初中的定语从句,要四句：写人两句,写物两句,要汉语

1.站在树下面的那个女士是我们的英语老师.
The lady who is sitting under the tree is our English teacher.
2.和我妈妈谈话的那个老人是我的外公.
The man whom (who)my mother is talking with is my grandfather.
3.我上周买的那本书很有趣.
The book which I bought last week is very interesting.
4.我找不到我爸爸去年给我买的那块表了.
I can't find the watch which my father bought me last year.