must

必须，一定；可以，应当；很可能中释aux

绝对必要的事物；未发酵葡萄汁英释中释nthe newly pressed juice of grapes or other fruit ready for fermentation

1 must be,一定；一定要；肯定是

2 must have,必须拥有；非有不可

3 must have been,一定（对过去事实肯定的推测）

4 must have done,必定做了…（表示对过去的推测）

5 must be going,该告辞了；必须去

6 must be off,[口]该走了

7 must needs,偏要；偏偏

8 must be valid,必须实事求是

1 Warm clothes are a must in the mountains..御寒衣物在山里是必不可少的。