What part of speech is “could”
Verb
Definition:
'could' is a past form of the verb 'can' and is mainly used as a verb to refer to a potential action that may take place. When used as a verb it is a modal verb that is used to express potential or ability in either the present or past. It is often used to express a polite request or query to another.
Examples:
1. 'She could fly across the country overnight.'
2. 'Could you help me out with this task?'
3. 'He could win the championship if he tried his hardest.'
Tips:
'could' is a gentle and polite alternative for 'can.' It is often used to make a request more gentle and to show politeness and respect. Additionally, the verb form of 'could' is often used when expressing an opinion that something might be possible.