couldn
- (it) can't/couldn't hurt (to do something)
- (it) can't/couldn't hurt to try
- (it) couldn't be helped
- (one) can't be arsed
- (one) can't believe (one's) (own) ears
- (one) can't believe (one's) (own) eyes
- (one) can't do right for doing wrong
- (one) can't look beyond the end of (one's) nose
- (one) can't look beyond the tip of (one's) nose
- (one) can't look past the end of (one's) nose
- (one) can't look past the tip of (one's) nose
- (one) can't see past the tip of (one's) nose
- (one) can't sit still (for something)
- (one) can't turn back the clock
- (one) can't turn back time
- (one) can't win
- (one) can't win for losing
- (one) can't win for trying
- (one) couldn't believe (one's) eyes
- a pile Jack Rice couldn't jump over
- a roll Jack Rice couldn't jump over
- cannot find hide nor hair of (someone or something)
- can't be bothered
- can't be helped. and couldn't be helped
- can't call (one's) time (one's) own
- can't cut the mustard
- can't get (one's) head around (something)
- can't get (something) for love or money
- can't go on
- can't hack it
- can't help but (do something)
- can't help but notice (that) (something)
- can't help noticing (that) (something)
- can't hit the (broad) side of a barn
- can't hold a candle to (someone or something)
- can't hold a light to (someone or something)
- can't hold it (in)
- can't last the pace
- can't make a lick of sense (out) of (something)
- can't make anything out (of something)
- can't punch (one's) way out of a paper bag
- can't punch (one's) way out of a wet paper bag
- can't see the forest for the trees
- can't see the wood for the trees
- can't stand (someone or something)
- can't stand the pace
- can't stay the pace
- can't stomach (someone)
- can't stomach (something)
- can't take (something)
- can't take a trick
- can't very well (do something)
- can't wrap (one's) head around (something)
- can't/couldn't very well do something
- couldn't (do something) to save (one's) life
- couldn't act (one's) way out of a paper bag
- couldn't act (one's) way out of a wet paper bag
- couldn't agree more
- couldn't ask for more
- couldn't be better
- couldn't be elected dogcatcher
- couldn't be happier
- couldn't care less
- couldn't care less, he/I/she
- couldn't carry a note in a bucket
- couldn't carry a tune in a bucket
- couldn't catch a cold
- couldn't fight (one's) way out of a paper bag
- couldn't fight (one's) way out of a wet paper bag
- couldn't fight your way out of a paper bag
- couldn't find (one's) way out of a paper bag
- couldn't get elected dogcatcher
- couldn't happen to a nicer (person)
- couldn't have asked for more
- couldn't help it
- couldn't hit the side of a barn
- couldn't lie straight in bed
- couldn't organise a bun fight in a bakery
- couldn't organise a chook raffle
- couldn't organise a chook raffle at a poultry farm
- couldn't organise a chook raffle in a (country) pub
- couldn't organize a piss-up in a brewery
- couldn't organize an orgy in a brothel
- couldn't pour water out of a boot
- couldn't pour water out of a boot if the instructions were on the heel
- couldn't pour water out of a boot with the instructions on the heel
- couldn't punch (one's) way out of a paper bag
- couldn't raffle a chook in a pub
- couldn't run a bath
- couldn't stop a pig in a passage
- get (one's) hands on (something)
- get a word in edgewise
- get to first base
- he, she, etc. couldn't punch his, her, etc. way out of a paper bag
- I couldn't agree more
- I couldn't ask you to do that
- I couldn't care less
- I couldn't have said it better myself
- I couldn't hear you over the sound of (something)
- I don't/couldn't give a monkey's
- it can't be helped
- land so poor you couldn't raise a fuss on it
- make (one) an offer (one) can't refuse
- not agree with (someone or something)
- not care twopence
- not get a word in edgeways
- not get a word in edgewise
- not get off the ground
- not give (a) tuppence
- not give a monkey's
- not give twopence
- not hold a candle to (someone or something)
- not hold a stick to (someone or something)
- not hurt a flea
- not hurt a fly
- not matter tuppence
- not matter twopence
- not miss (something) for the world
- not move a muscle
- not rest on (one's) laurels
- not say boo to a fly
- not take no for an answer
- not think twice
- not walk on water
- out of a paper bag
- wild horses couldn't drag (one) away (from something)
- wild horses couldn't drag (one) to (something)
- wild horses couldn't drag (something) from (one)
- Wild horses couldn't drag away
- wild horses couldn't drag me
- You can't make this stuff up.
- you can't swing a dead cat without hitting (someone or something)
- you couldn't swing a cat in here/there
- You couldn't!