$\text{1. is going }$

$\rightarrow$ HTTD - look! - S số  ít - is - Ving 

$\text{2. is crying }$

$\rightarrow$ HTTD - Listen ! - S số ít - is - Ving 

$\text{3. Is your brother sitting }$

$\rightarrow$ HTTD - at present - S số ít - câu hỏi - đảo Is lên đầu - Ving 

$\text{4. are trying }$

$\rightarrow$  HTTD - now - S số nhiều - are - Ving 

$\text{5. are cooking }$

$\rightarrow$ HTTD - hd xảy ra ngay khi nói - S số nhiều - chỉ 2 ng - are - Ving 

$\text{6. are talking }$

$\rightarrow$ HTTD - Keep silent - S số nhiều - are - Ving 

$\text{7. am not staying }$

$\rightarrow$ HTTD -  at the moment - S là I -am - Ving 

$\text{8. is lying }$

$\rightarrow$ HTTD - now - S số ít - is - Ving 

$\text{9. are traveling }$

$\rightarrow$ HTTD - at present - S số nhiều - are - Ving 

$\text{10. isn't working }$

$\rightarrow$ HTTD - now - S số ít - is - Ving 

`1` is going

look `=>` thì HTTD

`2` is crying

listen `=>` thì HTTD

`3`is sitting

at present `=>` HTTD

`4` are trying

now `=>` thì HTTD

`5` is cooking

`6` are talking

keep silent ! `=>` thì HTTD

`7` am not stay

at the momnent `=>` thì HTTD

`8` is lieing

now `=>` thì HTTD

`9` are traveling

at present `=>` thì HTTD

`10` isn't working

now `=>` thì HTTD