请随手关门。
qǐng suíshǒuguānmén 。
Please close the door conveniently.
他在随手做一些小事情。
tāzài suíshǒu zuò yīxiē xiǎo shìqíng 。
He is doing some small tasks in passing.
你可以随手把书放在桌子上。
nǐ kěyǐ suíshǒu bǎ shū fàngzài zhuōzǐ shàng 。
You can conveniently put the book on the table.