重點講解：
1. would
（通常用于疑問句中，表示禮貌地請求某人做某事）請；
eg. Would you do me a favour and get rid of this letter I've just received?
請幫個忙把我剛剛收到的這封信處理掉行嗎？
eg. Would you come in here a moment, please?
請進來一下好嗎？
eg. Would you excuse us for a minute, Cassandra?
卡桑德拉，我們出去一會兒你不介意吧？
2. have to
需要；必須；不得不；
eg. He had to go to Germany.
他不得不去德國。
eg. You have to be careful what you say on telly.
在電視上說話時你必須很謹慎。
eg. They didn't have to pay tax.
他們不必交稅。
3. It's hard to do sth.
常用句型，表示做某事很困難；
eg. It's hard to tell what effect this latest move will have.
很難說最近這次行動會有什么結果。
eg. She found it hard to accept some of the criticisms directed towards her and her work.
她發現某些針對自己和自己工作的批評意見很難接受。