present continuous tense

2. Present Continuous Tense

This tenses are used to express an action which is actually being done at this time.

FORM:

(+) S + to be + Verb-ing + O

ex: They are riding the bicycle

(-) S + to be + not + Verb-ing + O

ex: They are not riding the bicycle

(?) to be + S + Verb-ing + O

ex: Are they riding the bicycle?