kalimat nya sama dengan yg diatas beserta rumusnya

3. s + be(is,am,are) + v ing + o
I am going to school today
You are studying now

4. S + be (was/were) + v ing + O
biasanya tenses ini ada 2 kejadian yang terjadi secara bersamaan
I was eating when he came from the canteen
We were doing homework when he called yesterday