Constructions

~ㄹ/을 수 있/없다 is used to create the meaning of “one can…” or “one cannot…”

~고 있다 is attached to verbs to give it a meaning of “I am ___ing.”

~(으)면 is used to create the meaning of “when” or “if.

~ㄹ/을수록 is attached to verbs, adjectives and 이다 to indicate that, as one situation changes to some degree, another situation is affected and also changes to that degree.

~스럽다 can be added to some nouns to change them into an adjective.