`1.` She became sick with the flu six days ago.

`->` become + adj: trở nên như thế nào

`->` ago `->` thì QKĐ: `(+)` S + Ved/V2

`2.` He hasn't smoked since `2010.`

`->` S + quit + V-ing + in + time

`=` S + have/has not + P2 + since + time

`3.` I started doing this exercise rountine every day `10` years ago.

`->` S + started + V-ing + time + ago

`=` S + have/has + P2 + for + time

`4.` I wonder when treatment will start.

`->` S + wonder + wh question + S + V

`5.` How about going to the supermarket to buy some fresh vegetables?

`->` How about + V-ing?: vậy còn làm gì đó thì sao