Modal verbs are verbs that indicate likelihood, ability, permission or obligation. Modal verbs change the intention or meaning of the main verb in a sentence by showing whether an action is: Learn ...

Imagine trying to speak without expressing possibility, permission,or necessity; it would be like painting without colour. That’s were the modal verb step in. These special helping verbs—can, could, ...

Can and could are modal verbs that are used in a number of ways. Can you tell the difference between the two? If you're talking about what was possible in the past, you use 'could'. ‘Twenty years ago ...