List of special verbs

Infinitive	Present tense	Past tense	Past participle
to be	am, is, are	was/were	been
to have	have/has	had	had
to do	do, does	did	done
to be able to	can	could	been able
----	may	might	----
----	must	had to	----
----	shall	should	----
----	will	would	----

let

let's

Estos verbos son especiales porque nos ayudan a formar tiempos o expresiones al combinarse con infinitivo, presente o pasado participio de verbos no especiales.

Con el infinitivo pueden indicar:

Permiso:

-May I go to the bathroom?

-You may go.

Posibilidad:

-l may/might tell him.

-It may/might rain tonight.

Obligaci�n:

-We must hurry.

-l have to do my homework.

-l had to study very hard last night.

Habilidad:

-He can speak English.

-She can swim very well.

-l can play the guitar.

Be es auxiliar de verbos en pasado participio y terminaci�n ing.

Have s�lo es utilizado como auxiliar de verbos en pasado participio.

La forma en pasado participio de ambos verbos (been y had) no puede emplearse como auxiliar.

-He is working.

-They are running.

-You were playing cards when it started raining.

-l was having lunch while she was doing her homework.

-l have lived in Mexico City all my life.

-She has gone to Acapulco several times.

-l had worked a lot before you arrived.

Do en sus diversas formas, nos sirve para formar el negativo e interrogativo del presente y pasado simples y siempre va acompa�ado del verbo en su forma simple.

-Do you like chocolates?

-l don't like chocolates.

-Does he work?

-He doesn't work.

-Did he work yesterday?

-He didn't work yesterday.

Sugerencia:

Las part�culas let y shall se utilizan para expresar la intenci�n de realizar determinada acci�n o para hacer una sugerencia.

-Let's go to the movies tonight.

-Shall we go out for dinner?

-I shall go home now.

-You should get another job.

lntenci�n:

Would es una forma pasada equivalente de will al combinarse con presente perfecto. Combinada con verbos en su forma simple sirve para expresar intenci�n.

-I would have loved to go to the movies yesterday but I had to study.

-She would like to go dancing with you but she is busy tonight.

Futuro:

La part�cula will se utiliza para expresar el futuro al combinarse con los verbos en su forma simple.

-I will study for my exam tomorrow.

-He will arrive next week.