Expression of recommendation, obligation, advice and opinion

Source: Private Doc.

EXPRESSING RECOMMENDATION/SUGGESTION

should

SHOULD is used when we say what we think is a good thing or the right thing to do.

Pattern:

Subject + should + Verb 1

Example:            

Everyone should keep social distancing during corona virus pandemic.

You should wear a clean mask.

The students should attend online learning during covid-19 pandemic.

should not (shouldn't)

SHOULD NOT is used when we say what we think is not a good thing or the right thing to do.

Pattern:

Subject + shouldn’t + Verb 1

Example:            

Everyone shouldn’t  shake hands before washing hands.

You shouldn’t study at school before getting permission from local government.

The students shouldn’t attend face to face learning in classroom during covid-19 pandemic.

EXPRESSING OBLIGATION

Obligation = necessary

Pattern:

Subject + must + Verb 1

Example:

Everyone must work from home to minimize the spreading of Covid-19.

(This means it is necessary to work from home)

GIVING ADVICE

should & had better

Pattern:

Subject + should + Verb 1

Subject + had better + Verb 1

You should stop eating fatty foods.

We had better stop eating fatty foods.