根據(jù)括號(hào)內(nèi)的要求轉(zhuǎn)換句型。

1．Li Lei is writing a letter．（就劃線部分提問）

2．Daming is going to buy some clothes on his birthday．（就劃線部分提問）

3．He is going to play basketball tomorrow．（改為否定句）

4．Students will study at home．（改為一般疑問句）

5．My father is older than my mother．（同義句）

My mother is ____________ my father．