$\text{@su}$
`12`, hasn't been (Thì HTHT, có since)
`13`, taught (cấu trúc với when)
`15`, started (start + sth : bắt đầu cái gì)
`16`, reading / helps (find + N/V-ing = think + N/V-ing / help sb V)
`19`, will enjoy (thì TLĐ, có in the future)
`21`, is raining (S + V because + clause : bởi vì...)
`24`, will feel (will + Vbare : sẽ ...)
$\text{#BTS}$