being done:(动作)正在实施.
例:The coat is being washed.
(某人)正在洗衣服.
done:(动作)已经被实施.
例:The coat is washed.
(某人)已经洗过衣服.
to be done:(动作)尚待实施.
例:The coat is to be washed.
衣服需要有人来洗.