Difference (Should and Ought to)

Should and Ought to

Use:       
Use Should and Ought to give advice. 
Examples:           You should see a doctor. 
You ought to find a new job.     

Form:

Should
Should is a modal verb, like can and will, so it follows the same rules. 

1) Do not add ‘s’ to the third person singular.      

    He should buy a new car. NOT       He should buys a new car.

2) To form a negative, add not / n’t after should.  

    You shouldn’t do that!

3) To form questions, invert should and the subject. 

    What time should we arrive? 

4) Should is always followed by a verb in the infinitive form.

I should to go.           =>I should go.

5) You can also use should in the continuous form. Use should + be + verb-ing.

Why are you watching TV? You should be working!

Ought

Ought  is a semi-modal verb. It is similar to should in some ways:

1) Do not add ‘s’ to the third person singular.      

    He oughts to buy a new car.        =>  He ought to buy a new car.        

2) To form a negative, add not / n’t after ought.    

    You ought not to do that! 

   However, ought is not often used in negative sentences          

3) To form questions, invert ought and the subject. 

    What time ought we to arrive? 

   However, ought is not often used in questions.

Ought is different to should because:

1) Ought is always followed by to + a verb in the infinitive form.

                I ought go.      =>I ought to go.   

Exercices Ought to

Modals of Advice 2 - Should, Ought to, Had better

Type in the best modal to complete each sentence.

Some of the answers are incorrect or incomplete. Keep going!

1. My teacher told me that I ought to review my notes every day. I guess it's a good idea to look at them after class.
2. Do you think Carol should save her money or spend it? She is planning to go to Europe this summer.
3. I'm going to a party tonight. What should I wear: a dress or black pants?
4. Our car's gas tank is almost empty. We had better fill it up with gas soon or we will run out of gas!
5. If you are worried about getting fat, you should eat at McDonald's every day. You should eat healthy, low-fat foods like fruits and vegetables.
6. It's really raining outside right now. I had better forget my umbrella or I'll get wet!.
7. Where should we have lunch today: at home or in a restaurant?
8. My doctor feels that I ought to exercise more because I'm out of shape and want to lose weight. I think he's right.

Examples Ought to

OUGHT TO

The verb ought to only exists in simple present and present perfect forms
  Forms of ought to

All persons	Present	Present perfect
Affirmative	ought to	ought to have
Negative	ought not to,  oughtn't to	ought not to have,  oughtn't to have

Examples:
  It's raining hard, the children ought to come indoors.
  I didn't know you were married ! You ought to have told me !
  This pullover's got holes in it, I ought to get a new one.
 That's awful ! You really oughtn't to have done that, you know !

Ought to

The verb ought to only exists in simple present and present perfect forms.

• You ought to eat more vegetables.
• Tom ought to take her home

Ought To

"Ought to" is used to advise or make recommendations. "Ought to" also expresses assumption or expectation as well as strong probability, often with the idea that something is deserved. "Ought not" (without "to") is used to advise against doing something, although Americans prefer the less formal forms "should not" or "had better not."

Examples:

• You ought to stop smoking. recommendation
• Jim ought to get the promotion. It is expected because he deserves it.
• This stock ought to increase in value. probability
• Mark ought not drink so much. advice against something (notice there is no "to")

Using "Ought to" in Present, Past, and Future

Most modal verbs behave quite irregularly in the past and the future. Study the chart below to learn how "ought to" behaves in different contexts.

Modal Use	Positive Forms 1. = Present   2. = Past   3. = Future	Negative Forms 1. = Present   2. = Past   3. = Future	You can also use:
ought to recommendation, advice	1. Margaret ought to exercise more.2. Margaret ought to have exercised more so she would be better prepared for the marathon. 3. Margaret ought to come to the fitness center with us tonight.	1. Margaret ought not exercise too much. It might cause injury.2. Margaret ought not have run the marathon. She wasn't in good shape. 3. Margaret ought not stay at home in front of the TV. She should go to the fitness center with us.	should
ought to assumption, expectation, probability	1. She ought to have the package by now.2. She ought to have received the package yesterday. 3. She ought to receive the package tonight.	"Ought not" is used primarily to express negative recommendations. (See above.)	should

Notice "Ought not" Remember that "ought to" loses the "to" in the negative. Instead of "ought not to," we say "ought not." "Ought not" is more commonly used in British English. Americans prefer "should not." Examples: You ought not smoke so much. She ought not take such risks while skiing. They ought not carry so much cash while traveling.

Ought To

 

"Ought to" is used to advise or make recommendations. "Ought to" also expresses assumption or expectation as well as strong probability, often with the idea that something is deserved. "Ought not" (without "to") is used to advise against doing something, although Americans prefer the less formal forms "should not" or "had better not."

Examples:

• You ought to stop smoking. recommendation
• Jim ought to get the promotion. It is expected because he deserves it.
• This stock ought to increase in value. probability
• Mark ought not drink so much. advice against something (notice there is no "to")

Using "Ought to" in Present, Past, and Future

Most modal verbs behave quite irregularly in the past and the future. Study the chart below to learn how "ought to" behaves in different contexts.

Modal Use	Positive Forms 1. = Present   2. = Past   3. = Future	Negative Forms 1. = Present   2. = Past   3. = Future	You can also use:
ought to recommendation, advice	1. Margaret ought to exercise more. 2. Margaret ought to have exercised more so she would be better prepared for the marathon. 3. Margaret ought to come to the fitness center with us tonight.	1. Margaret ought not exercise too much. It might cause injury. 2. Margaret ought not have run the marathon. She wasn't in good shape. 3. Margaret ought not stay at home in front of the TV. She should go to the fitness center with us.	should
ought to assumption, expectation, probability	1. She ought to have the package by now. 2. She ought to have received the package yesterday.	"Ought not" is used primarily to express negative recommendations. (See above.)	should

HAVE GOT TO

HAVE GOT TO

 

"Have got to" is used to express necessity and obligation.

Examples:

• Drivers have got to get a license to drive a car in the US. necessity
• I have got to be at work by 8:30 AM. obligation

Using "Have Got to" in Present, Past, and Future

Most modal verbs behave quite irregularly in the past and the future. Study the chart below to learn how "have got to" behaves in different contexts.

Use	Positive Forms 1. = Present   2. = Past   3. = Future	Negative Forms 1. = Present   2. = Past   3. = Future	You can also use:
have got to necessity	1. People have got to be on time if they want to get a seat in the crowded theater. 2. SHIFT TO "HAVE TO" You had to be on time if you wanted to get a seat in the crowded theater. 3. You have got to be there on time tonight if you want to get a seat in the crowded theater.	1. SHIFT TO "HAVE TO" People don't have to be there on time to get a seat. 2. SHIFT TO "HAVE TO" You didn't have to be there on time to get a seat. 3. SHIFT TO "HAVE TO" You won't have to be there on time to get a seat.	have to, must
haven't got to future obligation		Haven't you got to be there by 7:00? Haven't you got to finish that project today? "Haven't got to" is primarily used to ask about future obligations. It can be used in statements, but this is less common.	Don't you have to