装修问答

悲剧。。.
估计是学校的填空题 就是三个空 还要必须填 只好这样
My father is writing a letter in his studay。。。

is writing a letter

is writing a letter

is writing a letter（现在进行时）
was wrote a letter (一般过去时）
will write a letter（一般将来时）