1 Imperative sentence is a sentence which gives a command, makes a request, or express a wish. Examples: Go to your room. (an order) Please lend me your book. (a request) Have a good time at the picnic. (a wish) Imperative sentence  The imperative is also very common in written instructions.  Be careful when you use the imperative, as it is often considered impolite in English.  If someone asks you for instructions, use the imperative.

2  Use the imperative to give a direct order. Take that chewing gum out of your mouth. Stand up straight. Give me the details.  Use the imperative to give instructions. Open your book. Take two tablets every evening. Take a left and then a right.  Use the imperative to make an invitation. Come in and sit down. Make yourself at home. Please start without me. I'll be there shortly. Have a piece of this cake. It's delicious.

3  Use the imperative to give friendly informal advice. Speak to him. Tell him how you feel. Have a quiet word with her about it. Don't go. Stay at home and take rest.  Make the imperative 'more polite' by adding 'do'. Do be quiet. Do come. Do sit down.  Use the imperative on signs and notices. Push. Do not use. Insert one rupee coin.

4 USE “SHOULD”  For giving advice. You should speak to him about it. You should see a doctor You should ask a lawyer.  To give an opinion or a recommendation. We should invest more in China. They should do something about this terrible train service. He should resign.  To express a personal opinion : often introduced by ' I think'. I think they should replace him. I don't think they should keep the contract. Do you think I should tell her?

5  After 'reporting verbs' such as demand, insist, propose, recommend, suggest. He demanded that we should pay for the repair. She insisted that she should pay for the meal. I have proposed that he should take charge of the organization. The committee recommends that Jane should be appointed. We have suggested that Michael should be given a reward for his hard work.

6 We use 'should' in various fixed expressions:  To show strong agreement They're paying you compensation? I should think so.  To emphasize a visible emotion You should have seen the look on her face when she found out that she had got the promotion.  When you regret not doing something in the past, you can say: I shouldn't have spoken to him like that. I should have apologized earlier.