寒いからコートを着るべきだ。

cold (e.g. weather); uninteresting (esp. joke); lame; dull; weak; corny

from (e.g. time, place, numerical quantity); since; from (originator); by; because; since; out of (constituent, part); through (e.g. window, vestibule); after; since

code; cord; chord

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to wear (in modern Japanese, from the shoulders down); to put on; to bear (guilt, etc.)

shall; should; must

be; is; indicates past or completed action; indicates light imperative