MODALSN OF OBLIGATION,PROHIBITION AND ADVICE / HAVE TO ,MUST,SHOULD

J HAVE TO ,MUST
HAVE TO ,CHANGES FORM
EJEMPLOS:
I HAVE TO GO TO SCHOOL
WE DONT HAVE TO GO IN THE CAR 
YOU HAD TO GO TO SCHOOL
SHE HAS TO BE HOME BY 10 PM
HE DOESNT HAVE TO DO ANY HOMEWORK TODAY 
THEY DIDNT HAVE TO CLEAN THE CAR
WE DONT USE CONTRACDTIONS IN THE POISITIVE
 YOU'VE TO GO.HE'S TO STAY

+++MUST HAS ONLY ONe FORM .THERE IS NO PAST TENSE OF MUST.
+++WE USE THE PAST FORM HAD TO.
I.YOU.HE.SHE.WE.THEY                          MUST CATCH the early bus.
                                                      MUSTN´T BE late.
+++++We use MUST and HAVE TO for a  rule or something it is necessary to do .
You MUST BE 198 to see that film.
hE HAS TO PRACTISE the guitar every day.
++++IN the past tense we use HAD TO. There is no past form of MUST.

She doesnt have to answer that email.
ella no tiene la obligacion de respeonder

+++SHOULD AND SHOULDNT. (ADVICE)
SHOULD = ONLY 1 FORM
SHOULD TIDY the living room
SHOULDNT make a mess
--We use SHOULD --> When we think its a good idea to do something

I should buy a present
SHOULDNT=___>   When we think its a bad idea to do something

---

 You shouldnt do your homework in front of the TV. 
----WE USE SHOULD wheen in questions when we ask for advice.

 
 

have to / OUGHT TO (SINONIMOS ) 
pero uno va antes de  infinitivo  de othero verbo.

OUGHT TBIT   
OUGHT NOT OTO = ANTICUADO,

HAVE TO , :
ANTES DEL INFITIVE OF ANOTHER VERB.

NECESSITY: 
mUST AND HAVE/HAS TO 
ABSOLUTELY NECESASARY TO DO 

MUST NOT = PROHIBITION ,ABSOLUTELY NECESSARY NOT DTO 

ADVICE: 
DSHOULD AND OUGHT TO 

 not as strong as must and have to .

+++MODALS IN THE PAST : 
||||WOULD HAVE DONE +
WOULD HAVE + PAST PARTICIPLE .
TO SPEAK ABOUT AN EVENT OR FEELING WHICH WE IMAGINE IN THE PAST BUT WHICH DID NOT HAPPEN.

I WAS SO FED UP T HAT I COULDNT GO TO THE CONCERT.I WOULD HAVE LOVED TO SEE THAT B AND.
IM SORRY YOU DIDNT GET AN INVITATION TO THE WEDDING. WOULD YOU HAVE GONE?

||SHOULD HAVE DONE

EVENT IN THE PAST --> WE REGRET OR WANT TO COMPLAIN ABOUT 
I DIDNT KNOW YOU WERE ALLERGIC TO CHEESE. YOU SHOULD HAVE TOLD ME.
YOU SHOULDNT HAVE GIVEN YOUR ADDRESS TO THAT MAN.
I KNEW THAT BACIKE EAS 

||| NEEDNT HAVE DONE 
WE USE NEEDNT HAVEE+PAST PARTICIPLE
ANCTION OF THE PAST WHICH HAPPENED BUT WHICH WAS NOT NECESSARY
MY BROTHER HAD A SPARE TICKET SO I NEEDNT HAVE BOUGHT ONE.
(= I BOUGHT A TICKET BECAUSE I DIDNT KNOW ABOUT THE SPARE ONE,SO I WASYTED MY MONEY)

°°DIDNT NEED TO .
DIDNT NEED ´+ INFINITIVE
WHICH WAS NOT NECESSARY AAND THEREFORE DI
DNT HAPPEN
MY BROTHER GAVE ME A SPRAE TICKET,SO I DIDNT NEED TO BUY ONE