A e i o u

Zero conditionals-if-when
If -prest. Result-prest.
Type 1 -if-unless
If-prest. Result-will+inf
Type 2
If-past simp Result-would+inf
Type 3 - if-But for
If-past perf. 
Result-Would+have+part

Los pronombres relativos son:
Who -que,quién,el cual-para personas
Whom-a quien, al cual-para personas
Whose-de quien, del cual, cuyo-para personas
Which-que, lo que, el cual-para cosas

Las condicionales:
Tipo I
a) if + simple present + simple present
( Se usa para expresar verdades científicas. )
b) if + simple present + simple future .
Ej.: If you dont study, you won´t pass your exams. . ( Si no estudias, no aprobarás tus exámenes )
c) imperative + or / and + simple future
( Se usa para expresar amenazas y promesas).
d) imperative + if / in case + simple present.
Tipo II
if + simple past + simple conditional.
Ej.: If i were rich, I would go to Australia (Si fuera rico, iría a Australia )
Tipo III
if + past perfect + conditional perfect
Ej.: If i had known that you were not at home, I would not have gone to your house.( Si hubiese sabido que no estabas en casa, no habría ido a tu casa.)
En algunos casos se pueden construir condicionales sin el if:
* unless: Se puede emplear unless con el significado de "if not" ( si no) .Ej.:Unless you work harder, you will fail your exams. ( a menos que trabajes duro, suspenderás tus exámenes )

PRONOMES RELATIVOS: WHO-> Personas/ WHICH-> Cousas, animais/ THAT-> Cousas, Animais, Verbos, Superlativos, Any. (Dependendo da palabra anterior, o antecedente, usarase Who, Which ou That) O relativo so se pode omitir cando o verbo da segunda frase xa ten un sujeto.// 

PARTICULAS QUE FUNCIONAN COMO RELATIVOS: WHOSE(cuyo, cuya, cuyos, cuyas) WHEN(cando) WHERE(donde), SEMPRE O PRINCIPIO DA SEGUNDA FRASE. SI leva comas cando añade informacion, NON leva comas cando especifica que cousa é. 

Past perfect (pasado perfecto)

Sujeto + "had" + participio pasado.

I, You, He, She, It, We, They

had

studied, visited, worked...

Voz Pasiva

Objeto (hace de Sujeto) + verbo "to be" conjugado + participio pasado + complemento. Por ejemplo: This house was built in 1980. [dis hausguasbilt In naiitiineití] Esta casa fue construida en 1980.

Modal Verbs
Ability and permission
can - poder, puedes
could - podrias, de posibilidad
be able to - = can
be allowed to - se permite?
Possibility and deduction
may - puedes, el mas comun
might - podria, posibilidad, sugerencias, peticiones
can - poder
could - podrias
must - hay que
obligation and necessity
must - hay que, obligacion
have to - tienes que
have got - tienen
need - necesario, necesidad
should - debes, deberias
ought to - deberias
ACTIVA PASSIVE
makes----------is made
is making------is being made
made-----------was made
was making---was being made
has made-------has being made
had made-------had been made
will make-------will be made
would make----would be made



REPORTED SPEECH
DIRECT INDIRECT
is seeing----------was seeing
sees----------------saw
saw-----------------had seen
has seen----------had seen
will see------------would see
is going to see-was going to see
can see------------could see

here-----------there
this------------that
these---------those
now-----------then
today----------that day
yesterday----the previous day
tomorrow----the next day