Modal Verb: Must
The structure :
(+) S + must + main verb
(-) S + must not + min verb
The main verb is the base verb (infinitive without "to").
The function :
Must have many functions to express necessity, prohibition and degree of certainty.
1. Express necessity
Must expresses what the speaker thinks is necessary. Must is subjective
- We must leave now.
- We must stop joking now
2. Prohibition
- You must not kill that bird. It’s bad.
- You must not play with fire!
3. Degree of certainty
Must commonly used to express certainty (present and past) that show the strong certainty (almost 95%)
- You must be kidding
- She must have been kidding
- She must be thirsty
- She must have been thirsty
It means the speaker is expressing a logical conclusion or a best guess.
(+) S + must + main verb
(-) S + must not + min verb
The main verb is the base verb (infinitive without "to").
The function :
Must have many functions to express necessity, prohibition and degree of certainty.
1. Express necessity
Must expresses what the speaker thinks is necessary. Must is subjective
- We must leave now.
- We must stop joking now
2. Prohibition
- You must not kill that bird. It’s bad.
- You must not play with fire!
3. Degree of certainty
Must commonly used to express certainty (present and past) that show the strong certainty (almost 95%)
- You must be kidding
- She must have been kidding
- She must be thirsty
- She must have been thirsty
It means the speaker is expressing a logical conclusion or a best guess.
Daftar pustaka:
ReplyDeleteSchrampfer azar, Betty, Understanding and Using English Grammar, longman; 1998.
http://learningenglish.com
http://englishclub.com
http://ccc.commnet.edu
Chalker, Sylvia and Weiner, Edmund, Oxford Dictionary Of English Grammar, oxford university press; 1994
Riley, Kathryn and Parker, Frank, English Grammar (Prescriptive, Descriptive, Generative, Performance), Allyn bacon; 1998.
Greenbaun, Sydney and Quirk, Randolph, A Student’s Grammar Of The English Language, longman; 1990.