constant,consistent,continual,contuous的区别

constant 表示“稳定的”、“不断的”或“不变的”、“可靠的”.例如：
We’ve had constant rain for three days.雨连续下了3天.
He is constant in his determination.他的决心不变.
continuous 只用来表示不停止的动作.例如：
There was continuous fighting on the frontier all day yesterday.昨天一整天,边境上战斗没有停止.
The aeroplane is capable of five days continuous flight.这种飞机可以连续飞行5天.
continual 经常用来指不时重复的动作（包括使人不快的动作）.常译为“不断的”、“连续的”,即认为没有止境.例如：
I can’t work with these continual interruptions.这样不断地打搅,我无法工作.
The noise of hammering was continual.锤打的噪音连续不断
consistent
始终如一的,前后一致的[(+in)]
He remained consistent in his opposition to anything new.
他始终反对一切新事物.
2.与...一致的;符合的[F][(+with)]
His behavior is consistent with his teaching.
他的行为与其教诲相符.