معرفی فعل‌های کمکی

Hi my name is Ms. Modal and today I will
give you a short introduction to Modals. Modals are a special group of
words that help main verbs, so they are called helping verbs. In a sentence they usually come after
the subject and before the main verb. When you put a modal with a main verb
it gives the verb a special meaning. You will learn about the special
meanings in other lessons, but first let's take a look
at the group of modals. Can, could, may, might, should, had better, must, will, and would. The most important rule about
modals is that they never change. He cans, no, they woulded, no. The second most important rule is
when you combine modals with verbs, the verb stays in the original form. Original form means there is no -s,
-ing, or -ed ending. For example, take the sentence, She runs. If I add can, it becomes She can run. The s is gone. Here are some more sample sentences. The students wore a uniform. I am taking the dog out. The boy is sick. If I add a modal to each
of these sentences, the verb changes back
to the original form. The students must wear a uniform. I should take the dog out. The boy might be sick. Where, take, and
be are all original verbs. Does this make sense? I hope so, let's do a quick review. Today, you have learned that
modals are helping verbs and you always use it with
the original form of the verb. Thanks for listening, bye.