`1`.is coming
`2`.are reading
`3`.are doing
`4`.is riding
`5`. are playing 
`6`.are sitting
`7`.is going
`8`.is playing
`9`.are playing
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Cấu trúc của thì HTTD
(+)S+to be+V-ing+O
(-)S+to be+not+V-ing+O
(?)To be+S+V-ing+O?
 `->`Đối với He/she/it/danh từ số ít+is
`->`Đối với I/they/we/danh từ số nhiều+are
DHNB:Now,at the moment,at present,now,...................

1, Look ! The bus is coming.

2, John and Peter are reading book in the library now.

3, Tim and Jack are doing their homework at the moment.

4, Nam is riding his bike to school now.

5, They are playing soccer in the yard at the moment.

6, We are sitting in the living room at present.

7, Minh is going fishing now.

8, Mr Tan is playing the piano now.

9, Ha and Hanh are playing badminton now.

 -----------------------------

-> Thì hiện tại tiếp diễn.

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

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

( ? ) Am / Is / Are + S + V-ing ?

-> I + am                   You / We / They + are                        He / She / It + is

Dấu hiệu nhận biết : now ; at the moment ; at present ;.............