可以说put their tent up 么 什么时候宾语放中间 是只有宾语是代词时放中间么

put up 是动副词组，宾语是代词时，只能放在两词的中间 put it/them up, 当宾语是名词时，可以放在两词的中间或后面，put their tent up/put up their tent.

对，只能是put up the tent.再比如cut up,可以说cut up bananas,如果是代词就用cut them up

可以的，但是如果是代词只能放中间

无论代词还是实义词都可以放在中间，但实义词可以放在up（此处为副词）后面，而代词只能放中间

宾语是代词的话必须放在动词短语中间的
如果是名词的话,放在中间也行,放在后边也行
比如：
Jim's grandma brought him up.
Jim's grandma bought up Jim.
Jim's grandma bought Jim up.

是的