求助英语基本语法.
when he going back to the hotel,the girl was died.
while he going back to the hotel,the girl was died.
upon he going back to the hotel,the girl was died.这3句话有对的么?when是不是只能接一句完整的话,那upon能接完整一句话么?
if 和 whether 意思都为是否的时候,都能起始一个句子么?
像：if you ever felt bored about traveling to NYC/ whether you ever felt bored about traveling to NYC?这2句是不是都可以?
talk about 后面这么用么：we can talk about that some students have culture shock while abroad.