such as后加的动词ing是动名词形式,

在such as后用作名词.such as后也可以加动词原形,但没那么太常见。

例子：动名词：I have a lot of things to do every day, such as cleaning, shopping and writing.原形：do anything silly such as marry him但是：You can do something else, such as cleaning the room注意一下这种情况,上面的clean后面加了ing但并不是动名词的原因,而是因为“cleaning the room"是作为“打扫房间”一个词组跟在such as后面的.在这里只是提醒一下做题的时候不要只盯着动词什么的,要注意全句再做决定.