by the time和by the end of的区别：中文含义及用法不同。当by the time表示将来的时间，主句用将来完成时，从句用一般现在时来表示将来的动作；by the end of多指时间，常用于完成时态,也可用于将来时态。
一、by the time的中文意思及用法介绍
by the time意为到…的时候。可以表示将来的时间，其主句用将来完成时，从句用一般现在时来表示将来的动作；也可表示过去的时间，其主句用过去完成时，从句用一般过去时。
例句：By the time you get there the meeting will be over.
By the time I arrived on the scene, it was all over.
She was tired and out of sorts by the time she arrived home.
By the time we arrived, someone had grabbed all the good seats.
By the time he'd fixed the leak, I was into him for$ 500.
By the time I get home, I'm too tired to do anything active
By the time we had made landfall the boat looked ten years older!
二、by the end of的中文意思及用法介绍
by the end of意为在…尽头。多指时间,常用于完成时态,也用于将来时态。
例句：The way things are going the company will be bankrupt by the end of the year.
I'm always broke by the end of the month.
Please bring back all library books by the end of the week.
They're aiming at training everybody by the end of the year.
Make sure your claims for expenses are submitted by the end of the month.