职业运动员上综艺节目:在He hopes he could 好，还是can好？

在He hopes he could 好，还是can好？ He... to climb the tree but he could not .(try) He asked his mother whether he could throw them away. He asked_____question before I could answered____. he could do nothing with him 是什么意思 he could do nothing with him “He hopes to pass the French exam.”句中pass后是还应该加in? “He wondered if he had bitten off more than he could chew" what's meaning? John insisted than he ___ everything he could to make sure of Lucy's happiness. I asked him 后面是跟if he can 还是if he could?