SHOULD (Auxiliary Verb)

- should indicate advice to do something or your opinion
- should is strong recommendation to do something about what is right or wrong
- But should is not as strong as must
- You can use ought to instead of should

(ex) You should not use drugs like Cocaine and Heroin.
(ex) You should study English to communicate with a foreigner.
= You ought to study English to communicate with a foreigner.

- We can use should when you expect something to happen
- should indicate that something will probably happen

(ex) It should not be difficult to pass the examination.
= I expect that the examination is not difficult.
(ex) The department store should be less crowded today.

- You had to do it in the past but you didn't do it, so now you regret not to do it
- You can compare should + verb word and should + have + past participle in following examples

Should + have + past participle

(ex) You should do homework now.
(ex) You should have done homework.
= You didn't do your homework, so you regret not to do it.

- You can use should after a number of verbs, especially

following verbs + that .... (should) verb word

order, command, propose, suggest, move, insist, desire, demand, require, wish, decide, determine .....

(ex) He demanded that I should apologize.
(ex) He suggested that we should have dinner together.

- You can use should after a number of adjectives, especially
- There are two kinds of adjectives. One is about emotion and the other is about reason.
- should can be omissible

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It is + adjectives + that .... (should) + verb word ....

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good, proper, important, well, absurd, natural, right, wrong, rational, necessary ....

reason adjectives

curious, odd, strange, surprising, regrettable, wonderful

emotion adjective

(ex) It is necessary that you should study English.
(ex) It is strange that he should be absent.

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