SHOULD

Example:

You seem to be sick because your face is pale and you cough a lot. You should see a doctor!

Form:

                                    Should + main verb

Note:

“should” keeps the same form for all  subject pronouns:

I, you, he, she….. they  should

Use:

“Should” is a modal used to give a piece of advice to someone.

Context:

Now and future.

Note: 

To give a piece of advice in the past context, we use the following form:

                                     Should + have + past participle

Example:    You should have seen a doctor.