The examples below show how an action, state, or occurrence can be moved from a noun back to a verb. In your scientific paper, use verb tenses (past, present, and future) exactly as you would in ...

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.

For example: I bent down to pick up a penny. The correct past tense of the verb to bend is 'bent' not 'bended'. She swam three lengths in the swimming pool. 'Swam' is the correct past tense of the ...

Some past participles are irregular. For example, He hecho mis deberes - I ... The first part of the perfect tense is the present tense of the verb haber, which is known as an auxiliary verb.