Đáp án + giải thích các bước giải

`13`. as fat

`14`. the noisiest

`15`. better

`16`. the easiest

`17`. more beautiful

`18`.many

`19.` most dangerous

`20.` as difficult

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 So sánh bằng với many : S + V + as + many/much.... + noun + as + noun/pronoun

So sánh bằng: S + V + as + adj/adv + as + N/Pronoun/Clause

So sánh hơn: S + V + (Adj/Adv) + “-er” + than

                      S + V + more + Adj/Adv + than

So sánh nhất: S + V + the + Adj/Adv + -est

                      S + V + the + most + Adj/Adv

`13.` as fat

`14.` the noisiest

`15.` better

`16.` the esiest

`17.` more beautiful

`18.` many

`19.` most dangerous

`20.` as difficult

`-` Form: S + V + as + (many/much/a lot/...) + N + as + Noun/pronoun

`-` Form: S + be/V + as + adj/adv + as + Noun/pronoun

`-` Form: S + V + the + adj-est/most + adj + Noun/pronoun