1704947529
Must I come at four o’clock?” “Oh no. You needn’t come at four.”“我一定要在4点钟来吗？”“啊不，你不必在4点钟来。”
1704947530
1704947531
表示过去情况时也可用must：
1704947532
1704947533
It was too late to go back. We must (had to) go on．回去已经太晚了，我们必须继续往前走。
1704947534
1704947535
She must see him that very evening．就在那天晚上她得去见他。
1704947536
1704947537
I said I must leave, but I stayed．我说我得走，但我留下了。
1704947538
1704947539
在这种情况下，用had to的时候更多一些，因为这样时间关系可表示得更清楚些。试比较：
1704947540
1704947541
I must leave at six．我得6点钟走。
1704947542
1704947543
I had to leave at six yesterday．昨天我得6点钟走。
1704947544
1704947545
must可用来表示揣测，可译为“一定是”、“准是”、“想必”：
1704947546
1704947547
Judging by the smell, the food must be good．从气味上看，这菜一定很好。
1704947548
1704947549
It’s a quarter past three. He must be in by now．现在三点一刻，他准已到家。
1704947550
1704947551
If you can eat all those apples you must have a good digestion．如果你能把这些苹果全吃下去，你的消化力想必很好。
1704947552
1704947553
有时后面可跟完成形式，表示已发生的情况：
1704947554
1704947555
He must have arrived by air．他一定是坐飞机来的。
1704947556
1704947557
You must have misheard．你准是听错了。
1704947558
1704947559
His watch must have stopped．想必是他的表停了。
1704947560
1704947561
也可跟进行形式表示正在发生的情况：
1704947562
1704947563
You must be joking！你一定是在说笑话。
1704947564
1704947565
Rose must be looking forward to his return．罗丝准是在盼望他回来。
1704947566
1704947567
You must have been thinking of something．你准是在想心事。
1704947568
1704947570
620 mutual—reciprocal
1704947571
1704947572
mutual有两个意思，一是表示“相互的”：
1704947573
1704947574
There had been a great measure of mutual respect．他们相互间非常尊重。
1704947575
1704947576
Bill disliked the man, and the feeling was mutual．比尔不喜欢这人，这种感情是相互的。
1704947577
1704947578
They are in danger of mutual destruction．他们有互相毁灭的危险。
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