The present tense describes what's happening now. Depuis is used with the present tense to say how long something has been happening. Learn how to form sentences using the present tense. Key verbs - ...

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. (You will get ...

Sometimes you know a word has two forms, but you 're not sure which one is appropriate to use in the situation at hand. This happens a lot with verbs, where past-tense forms can compete for acceptance ...

Natural languages comprise elaborate systems of rules that enable one speaker to communicate with another 7. These rules serve to simplify the production of language and enable an infinite array of ...