Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings

to allow; to permit; to be able to

Used between a verb and its result to show that the action cannot achieve that result; used as the negative form of the 得 de potential construction

Used between a verb and its result to show that the result is possible, as in 看得见 kàn​de​jiàn meaning "able to see"

Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings

to obtain; to receive; to gain