can't help

beggars can't be choosers

Something is better than nothing: those who can't provide for themselves should accept whatever help is available.

can't carry a tune in a bucket

Sings very badly.

can't get enough

Greatly enjoys; likes a lot.

can't stand

cannot put up with

can't stand the sight of

To hate vehemently; to really despise.

can't wait

To eagerly anticipate; to find it hard to wait for a forthcoming pleasurable event.

cry for help

Acting out as a means of displaying a subconscious desire for attention or help.

help a lame dog over a stile

to show kindness to, or to help out, someone in distress or in need