Make sure all the lights turn off when you leave the room.这句

其实是不准确的,
make sure 要接of 或从句
原句最好改为
Make sure all the lights are off when you leave the room.
例子：
Make sure you read all the small print before signing.
一定要先看清小号字体印刷部分再签字.
I think the door's locked, but I'd better go and make sure (it is).
我想门已经锁了, 但我最好还是去查看一下.
Make sure that the sign's the right way up.
一定要把符号的上下弄对.
It may freeze tonight, so make sure the plants are covered.
今晚大概会有霜冻,一定要把花草都遮盖好.
Make sure the central heating is off.
集中供暖设备一定要关掉.
Make sure that you put down every word she says.
切实要记下她说的每一个字.
To make sure that he was at home, I called him up in advance.
为了确定他在家,我事先打电话给他.
I tried to make sure of the problem.
我想把这个问题弄明白.