1.语法讲解：情态动词must和have to的用法
语法归纳：must通常表示主观上的“必须”，have to通常表示客观上的“不得不”。
1）has / have to = has / have got to，后者常常用于口 语中。
2）has / have to 的过去式为had to。
例如：You must clean your own room.
你必须打扫你的房间了。
I have to leave at 6 o’clock this afternoon.
今天下午六点钟我必须得走。
Last winter, we had to wear gloves and scarf.
去年冬天，我们不得不戴上手套和围巾。
Have you got to go?
你一定要去吗？
2.If anyone ever asked her how old she is, she always answers, ‘My dear, it must be terrible to be grown up!'
一旦有人问她有多大年纪，她总是回答：“亲爱的，长大成人真可怕啊！ ”
知识点1：此句中if引导真实条件句，主句用一般现在时表示将来。
知识点2：grow v.生长；grow up长大；grown up长大成人（grown为grow的过去分词)
3.In spite of this, she often appears on the stage as a young girl.
尽管如此，她依然经常在舞台上扮演小姑娘。
知识点1 in spite of = despite意为“尽管如此”，后面经常接名词（短语)或代词(短语)。
试译：尽管已经上了年纪，我爷爷依然每天都要劳动。
Despite old age, my grandfather still works hard every day.
再译：尽管天气恶劣，我们还是及时赶到了办公室。
In spite of terrible weather, we arrived at the office in time.
知识点2：扮演……角色：appear on the stage as sb, / perform in the role of …
Because he looks very young, he often performs in the role of little boy.
因为他长得很年轻，所以常常扮演小男孩的角色。
