The Verb "Could"
Could is used as both an auxiliary verb and a modal verb.
Could is almost always used with a main verb.
- I could not call you last week.
- We could not drive the car yesterday.
- They could not take the exam last week.
Could is used as the past tense of "can".
- I could help you learn English.
- We could come over next week.
- My friends could fix your car.
Could is used to request something in the present tense.
- Could you give me some money?
- Could you help me with my car?
- Could you come and pick us up?
Structure of "could":
- When using as a model verb or an auxiliary verb the verb "could" stays in its base form.
- Could does not change form according to the subject.
- Could is followed by a main verb. The main verb also stays in its base form. The main verb that is used with could does not change form according to the subject.
|Positive Sentences||I||could||-||go||to the store.|
|Negative Sentences||We||could||not||go||to the store.|
|Questions**||Could||they||-||go||to the store.|
* All subjects are: I, we, they, you, plural nouns, singular nouns and uncountable nouns.
**Questions - When could is used to ask a question, could comes before the subject.