远不只是 time 这个词的。 以下句子均正确。可自己观察总结一下: I had an easy morning taking the test. Did you have a good time travelling around South America? You'll have a terrible week working on that project.
you will have a difficult time knowing这一部分中有两个动词。 则knowing为非谓语动词.know在句中表主动.所以加ing 如果你变得富有,你将很难知道谁是你真正的朋友. difficult time不用刻意的去翻译.have difficult time 表困难.