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phasal verbs

2915muak
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HAVE TO, MUST AND WOULD
Io, America, Estefania 
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01
"HAVE TO- HAS TO"
we use the verb "have to" to express necessity or obligation external, that is to say obligations imposed for others.
Have to means "tener que" or "deber"

One from the characteristics important that the distinguished from the "auxiliary pure", as "must" is that require of auxiliary "do" for interrogation and negation.
He is also adding (s) to the third person singular.
STRUCTURE
  • (+) SUBJECT+HAVE TO/HAS TO+VERB+COMPLEMENT. 
  • (-) SUBJECT+DOSEN'T/DON'T+HAVE TO+VERB+COMPLEMET.
  • (?) DO/DOES+SUBJECT+HAVE TO+VERB+COMPLEMENT+? 
  • (?) WH+DO/DOES+SUBJECT+COMPLEMENT+?
EXAMPLES:
  • (+)I have to study for the exam. 
  • (-) She doesn't have to study for the exam.
  • (?) Does she have to open the window?
02
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Would (Past Of Will)
We have seen some other time we used WOULD (past WILL) as an aid to build the Conditional Simple used to describe situations that occur in the future but whose starting point is in a past tense, ie indicating an action that in the past it was positioned in the future and to which we refer in this, for example:
I Knew That She would travel to London.
Yo sabía que ella viajaría a Londres.
 It is also used to indicate situations that can not be performed because they depend on a condition that may be expressed or not: 
We would buy a new car.Nosotros compraríamos un nuevo automóvil.(For we achieve buy the car must meet a condition that is not expressed in this case)
Now we will see how WOULD fulfills its function accompanied modal verb infinitive verb phrases like LIKE to express courtesy whether invitations or offers: 
Would you like a chocolate?       ¿Te gustaría un chocolate? 
 
Would you like to visit me?                ¿Te gustaría visitarme? 

Would you like a cup of tea?       ¿Te gustaría una taza de té?
(+):  subject + would + "verb in infinitive"+complement.


(-): subject +(wouldn't)+ verb in infinitive + complement. 


(?): Would + subject + v erb in infinitive+complement +?

(?): wh question + would + subject + verb in infinitive + complement + ?
structures
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"Must" is a modal auxiliary . It is mainly used to indicate an obligation or prohibition
must- ''debe obligatoriamente''
Modal verbs are the same for everyone and always followed by an infinitive ( without 'to ' ) . In addition , they need help to form the negative and interrogative
...as must form...
...some rules...
  • 'must' is often compared to 'have to' and both can be translated as ' tener que ' or ' deber ' .
  •  The modal 'must' is used only in the present. For all other times we will use the structure concerned with 'have to' .
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affirmative
negative
interrogative
structures
        short answer
sub +aux +verb+complement
            must
sub + aux     + verb+complement
             musn't
must+sub+verb+complement+???

yes or not +sub+must

examples
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