fall ,fell ,fill ,full

fall 三態	fell	fallen	falling
	fell 三態	felled	felled	felling

fall 落下；跌倒 [no + object]
   fell fallen falling

fell 砍伐，砍倒 [+ object]
   felled, felled, felling

fill 裝滿；填滿

full 滿的；充滿的