Linked with 得, 倒 can indicate a rebuking tone, saying things like "what you are saying is the opposite". Note that first-person pronoun is not used in such sentences.
倒 can also be used with adjectives in affirmative sentences to indicate the speaker is a little surprised.
倒是 can be used to urge somebody to response quickly.
Pattern: 你倒是 + Verb + 呀/啊!