The past tense of beat the living daylights out of is also beat the living daylights out of.
The third-person singular simple present indicative form of beat the living daylights out of is beats the living daylights out of.
The present participle of beat the living daylights out of is beating the living daylights out of.
The past participle of beat the living daylights out of is beatbeat the living daylights out of the living daylights out of.