MEMBUAT KESIMPULAN LOGIS: MUST

(a)    A: Nancy is yawning. B: She must be sleepy.	In (a): SPEAKER B is making a logical guess. He bases his guess on the information that Nancy is yawning. His logical conclusion, his “best guess”, is that Nancy sleepy. He uses must to express his logical conclusion.
(b)   LOGICAL CONCLUSION: Amy plays tennis every day. She must like to play tennis. (c)    NECESSITY: If you want to get into the movie theater, you must not like pickles.	COMPARE: Must can express: ·         a logical conclusion, as in (b). ·         necessity, as in (c).
(d)   NEGATIVE LOGICAL CONCLUSION: Eric ate everything on his plate except the pickle. He must not like pickles. (e)    PROHIBITION: There are sharks in the ocean near our hotel. We must not go swimming there.	COMPARE: Must can express: ·         a negative logical conclusion, as in (d). ·         prohibition, as in (e).