the falling maple leaves(正在掉落的枫叶)、the fallen maple leaves( 已经掉落的枫叶)、the maple leaves are falling down(枫叶正在飘落)、the maple leaves have fallen down(枫叶已经飘落了)
the falling maple leaves(正在掉落的枫叶)、the fallen maple leaves( 已经掉落的枫叶)、the maple leaves are falling down(枫叶正在飘落)、the maple leaves have fallen down(枫叶已经飘落了)