`1,` eat

`->` usually `->` HTĐ

`2,` are eating

`->` today `->` HTTD

`3,` drink

`->` always `->` HTĐ

`4,` are drinking

`->` now `->` HTTD

`5,` wear

`->` usually `->` HTĐ

`6,` are wearing

`->` today `->` HTTD

`7,` sit

`->` normally `->` HTĐ

`8,` are sitting

`->` today `->` HTTD

_____________________

`@` HTĐ

`(+)` S + V-s/es/inf ...

`(-)` S + don't/doesn't + Vbare-inf ...

`(?)` Do/does + S + Vbare-inf ... ?

`@` HTTD

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

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

`(?)` Am/is/are + S + V-ing ... ?