A regular verb is one that conforms to the rules of grammar, whereas an irregular verb is one that does not. Keep in mind that each sentence you write will need to have agreement between its subject ...

Look out for modal verbs particularly where there are rules to be followed. Notice how you use them in your own writing to express the likelihood of something happening.

In this exercise, you'll see input verbs and model verbs. If you choose ring as your model verb, and then bring as your input verb, bring will conjugate the way that ring normally does.