Ought to | Modal auxiliary verb

Ought is a modal auxiliary verb. There is no -s in the third person singular.

Ought is different from other auxiliary verbs. It is used with to

Note that to is dropped in question tags.

Ought does not have infinitives (to ought) or participles (oughting, oughted). Questions and negatives are made without do.

Ought is rarely used in questions and negatives; should is generally used instead. A structure with think ... ought is also common.

Ought: Meaning

Ought expresses duty, necessity, desirability and similar ideas. It is often used to advise people - to tell them that they have a duty to do things. The meaning is similar to should

Ought is not as forceful as must.


To express probability

Ought can express logical probability.

Ought to have + past participle

When ought refers to past time, it is followed by the perfect infinitive. This structure can be used to talk about things which were supposed to happen but did not.

This structure can also be used to make guesses.

Ought not to have can be used to talk about things that happened unnecessarily.

See also

Common mistakes in the use of nouns
Common mistakes in the use of nouns | Exercise 1
Common mistakes in the use of nouns | Exercise 2
Common mistakes in the use of nouns | Exercise 3

More CBSE English Grammar worksheets

Passive voice worksheet | Simple past tense
Passive voice worksheet | Past continuous tense
Passive voice worksheet | Simple future tense
Passive voice worksheet | Future perfect tense


Recent Posts

Grammar Worksheets

English Grammar

Business English

Practical English Usage

English Vocabulary

English Speaking

Class 10 Grammar Worksheets

Class 9 Grammar Worksheets

Class 8 Grammar Worksheets

Class 7 Grammar Worksheets

Class 6 Grammar Worksheets

Class 5 Grammar Worksheets

Class 4 Grammar Worksheets

Class 3 Grammar Worksheets

Class 2 Grammar Worksheets

Kerala Syllabus

Enter your email address to receive our lessons in your inbox:

Delivered by FeedBurner

Vocabulary | Speaking | Exams | Practical English Usage | English Writing | Grammar Worksheets

All Rights Reserved perfectyourenglish.com