【俚語】

Be as sick as a dog 病得很重

【例句】

Sally was as sick as a dog and couldn't go to the party.

Be as blind as a bat（蝙蝠）
看不清的，看不見的

【例句】

I've worn glasses for 20 years, so I'm as blind as a bat now.

Be as busy as a beaver （海貍）
非常忙

【例句】

Between working two part-time jobs, volunteering on the weekends, and looking after his little brother, Sam's been as busy as a beaver this summer.

Be as stubborn as a mule（驢）
非常倔強

【例句】

If you tell her what to do, she won’t do it because she’s as stubborn as a mule.

Be as drunk as a skunk（臭鼬）
爛醉如泥

【例句】

Do you remember last night at all? You were as drunk as a skunk!