"this can be a useful key" vs "this could be a useful key"

Question

"this can be a useful key" vs "this could be a useful key"

Both phrases are correct and commonly used in English. They are interchangeable and convey the same meaning. The choice between 'could' and 'can' depends on the context and the level of certainty or possibility the speaker wants to express.

Last Updated: March 17, 2024

This phrase is used to express a possibility or certainty about the usefulness of the key. 'Can' implies a higher level of certainty compared to 'could'.

Examples:

This can be a useful key to solving the problem.
This can be a useful key to achieving success.

Alternatives:

this is a useful key
this may be a useful key
this might be a useful key
this is likely a useful key
this is probably a useful key

This phrase is used to express a possibility or uncertainty about the usefulness of the key. 'Could' implies a lower level of certainty compared to 'can'.

Examples:

This could be a useful key to unlock the mystery.
This could be a useful key to understanding the problem.

Alternatives:

this might be a useful key
this may be a useful key
this is possibly a useful key
this is potentially a useful key
this seems like a useful key

Answer 1

this can be a useful key

This phrase is correct and commonly used in English.

Answer 2

this could be a useful key

This phrase is correct and commonly used in English.

"this can be a useful key" vs "this could be a useful key"

this can be a useful key

this could be a useful key

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