`1.` She's jumping rope.

`_` she is `=` she's

`2.` It's very snowy today.

`_` it is `=` it's

`3.` They're playing hide-and-seek at the playground.

`_` they are `=` they're

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`@` Hiện Tại Tiếp Diễn:

`+)` S + am/ is/ are + V-ing

`-)` S + am/ is/ are + not + V-ing

`?)` Tobe + S + V(ing)?

`_` Yes, S + am/ is are

`_` No, S + am/ is/ are+ not

`@` Lưu ý viết tắt 1 số từ trg TA:

`_` are not = aren't

`_` is not = isn't

`@` Dấu hiệu nhận biết: now, at the moment, currently,.....v...v......