yes you can
example:may i go to the washroom
may i go washroom有人说summer camp 是固定搭配，不可以加ing 啊？？？？ing is something your doing right nowlike; im reading, listening这个我知道，我说的是固定搭配，这里有没有这个固定搭配？i don't think so you can change the summer to winter camp, it doesn't have to be summerOk, Thank you!yw