Wiktionary
vb. (past participle of burn down English)
Usage examples of "burnt down".
You did what you did, then you burnt down the shack, or you took them outside and dug a hole real deep and stuck them down there.
He saved us from perishing in the flames which burnt down our father's house, and has protected us here ever since.
The thieves boldly took their plunder to the millers to be ground, and the millers, although aware that fields and barns had been recently robbed, did not dare to object, lest their mills should be burnt down over their heads.
I suppose you are a stranger in these parts, or you would have heard what happened last autumn, -- Thornfield Hall is quite a ruin: it was burnt down just about harvest-time.
In the wash-up from the fire, there's four houses burnt down as well as the picnic rotunda in the Historic Park, St Stephen's and the priest's house.
The sun was high and blinding and it burnt down upon me, and there was no escape from it on this terrace.