正在进行时：he is taking a shower 他正在洗澡
一般现在时：he takes shower everyday 他每天洗澡
一般过去时：he took a shower yesterday 他昨天洗澡了
现在完成时：he has taken a shower 他已经洗过澡了
过去完成时： I had taken shower for two hours before I met him 我在遇见他前已经洗了2小时的澡了
现在完成进行时：I have been teaching here for 2 years 我已经在这里教了2年了
过去完成进行时：I had been teaching here for 2 years before I met him 在遇见他之前我已经在这里教了2年了
现在完成被动语态：the apples have been eaten by Reus 这些苹果被罗伊斯吃了
过去完成被动语态：the apples had been eaten by Reus last night 这些苹果昨晚被罗伊斯吃了