Present Continuous Tense

Well, this morning I teach my students about Present Continuous. And luckily most of them already know this topic. Let me tell you..

Present Continuous Tense
The rule is S + to be (is, am, are) + Ving + Obj

This is the example:

I am doing homework now.
I am not doing homework now.
Am I doing homework now?

She is writing a love letter to her boy friend.
She is not writing a love letter to her boy friend.
Is she writing a letter to her boy friend?

For the ending, I ask my students to create the conversation by using this tenses. They gonna post it on their's blog.
I gonna check it later.

Regards🙌