"Fell the tree"
Kuanguka = to fall
Miti inaanguka. = Trees fall.
Mti ulianguka. = The tree fell.
Mti umeanguka. = The tree has fallen.
Kuangusha = to fell (to cut down, drop, make fall)
Angusha mti. = Fell the tree. = Cut the tree down.
Wanaangusha miti. = They fell trees. = They cut[present] trees down.
Waliangusha miti. = They felled trees. = They cut[past] trees down.
Wameangusha miti. = They have felled trees. = They have cut trees down.
Mti umeangushwa. = The tree has been felled.