`3.` You'd better not eat too much candy.
`-` Form: S + had better ('d better) + not + V-inf + ...
`4.` He drives more slowly and more carefully than I do.
`-` Form: S + V + more + adv + and + more + adv + than + N/pronoun/Clause. (adv + and + avd `->` So sánh hơn)
`5.` The visitors spoke too quickly for me to understand what he said.
`-` Form: S + V + too + adv + (for sb) + to V-inf +....