This High English quiz on tenses focusses on the present continuous tense. The present continuous tense uses the verb TO BE and the '__ING' form of another verb. The form basically comprises two parts: BE (AM, ARE and IS) and a verb ending in '__ING'. For instance: ‘She is dancing’ is a sentence following the form just described using the verb TO BE (IS) and '____ING' (DANCING).
The use of the present continuous tense is to describe actions that are taking place now, but have begun before now and will continue for a short while after now. Usually, you add a component of time, such as ‘now’ or ‘at the moment’, to make it more clear, as in the sentence ‘they are singing now.’