1
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MUST AND MUSTN'T

2
00:00:11,599 --> 00:00:15,359
What do you use MUST for?

3
00:00:16,379 --> 00:00:18,899
Obligation. Express a mandatory action.

4
00:00:20,059 --> 00:00:24,320
Example. You must wear a cell belt when driving.

5
00:00:25,280 --> 00:00:27,500
Redaction. Certain something is true.

6
00:00:28,739 --> 00:00:32,700
Example. Look at the snow. It must be cold outside.

7
00:00:33,659 --> 00:00:37,240
Strong recommendation. To emphasize a recommendation.

8
00:00:38,140 --> 00:00:44,140
we must get together for a dinner soon.

9
00:00:44,140 --> 00:00:47,140
What do you use mustn't for?

10
00:00:47,140 --> 00:00:52,140
to express actions that are not permitted.