Question

My father is always busy ____ his car at home. A.wash B.to wash C.washing 选C原因

My father is always busy ____ his car at home.
A.wash B.to wash C.washing 选C原因
好像是有个……busy……结构，是什么

Answer 1

be busy doing sth 忙着做某事
固定形容词短语，后面接v-ing作宾语。

祝你开心如意！

追问

哦，那always后面加动词改用原型，ing还是其他呢
如What time does James always (take) a shower?

追答

always 后面一般要使用【一般现在时态/现在进行时态】，即要使用动词原形或单数第三人称形式；或v-ing。
What time 【does 】James always 【take】 a shower?

正确。一般现在时态单数第三人称形式。