CONSTRUCTION: ta form (#3) + ほう が いい hou ga ii
休んだ ほう が いい。
yasunda hou ga ii.
It would be better to rest.
聞いた ほう が いい。
kiita hou ga ii.
It would be better to ask (someone).
NOTE: The ta form is the same as the past tense. (But obviously it is not past here)