VERBS AND PRESENT PROGRESSIVE
The present progressive is used in English for to talk about situation that's happening at moment. For example: I'm eating. This a situation that I'm doing in a moment.
AFFIRMATIVE SENTENCES
I'm writing a letter
The scientist are developing a experiment
NEGATIVE SENTENCES
I'm not writing a letter
The scientist aren't developing a experiment
INTERROGATIVE SENTENCES
Am I writing a letter?
Are the scientist developing a experiment?
TO PRACTICE
