Introduction

Modal Verb ＂Could＂: Form and Usage

"Could" is a modal verb that denotes ability, possibility, or permission. It is commonly used to express past ability or request permission in a polite manner. Understanding the correct forms and usage of "could" is essential for effective communication.

Form

The form of "could" used depends on the tense and context of the sentence. It has two main forms:

Present Tense: could Past Tense: could

Usage

Ability

"Could" is used to express past ability or capacity.

Example: He could swim when he was a child.

Possibility

It can also indicate a possibility or likelihood.

Example: The rain could come at any moment.

Permission

In polite requests, "could" is used to seek permission.

Example: Could you please open the window?

Past of Can

"Could" is often used as the past tense of "can" to express general ability in the past.

Example: I could read when I was five.

Other Uses

Suggestions: "Could" can be used to make suggestions. Example: They could go to the park for a picnic. Advice: It can also indicate advice or a course of action. Example: You could try talking to him about it.

Form in Different Tenses

| Tense | "Could" Form | |---|---| | Present Tense | could | | Past Tense | could | | Present Perfect Tense | could have | | Past Perfect Tense | could have | | Future Tense | could (with "will" or "would") | | Future Perfect Tense | could have (with "will have" or "would have") |

Examples

Present Tense: They could help us with the project. Past Tense: The child could not speak when they were born. Present Perfect Tense: I could have done better on the exam. Past Perfect Tense: The boy could have stolen the necklace. Future Tense: I will/would like to ask if you could help us. Future Perfect Tense: They will have/would have been able to finish the work by tonight.

Conclusion