$\text{3. are designing }$
$\rightarrow$ HTTD - at the moment - S số nhiều - are - Ving
$\text{4. does/ get }$
$\rightarrow$ HTD - usually - S số ít - đảo does lên đầu - V
$\text{5. don't understand }$
$\rightarrow$ HTD - S là I - do (-) - V
$\text{6. is talking }$
$\rightarrow$ HTTD - at present - S số ít - is - Ving
$\text{7. is running }$
$\rightarrow$ HTTD - Sit down ! - S số ít - is - Ving
$\text{8. sets off }$
$\rightarrow$ HTD - every .. - S số ít - Vs/es
$\text{9. play }$
$\rightarrow$ HTD - always - S số nhiều - V nguyên
$\text{10. has / is having }$
$\rightarrow$ HTD - usually - S số ít - Vs/es ; HTTD - hđ chỉ xảy ra trong hôm nay - is - Ving
