区别 in time, at one time, at the same time, on time

有一读者问: 如何做这道题:

(1)If you keep on, you'll succeed.

A. in time B. at one time C. at the same time D. on time

首先我们应弄清上述四种选择的意义。第一种选择是 in time,通常有两个意义。一是“及时”,如:

(2)I got there just in time .

二是“终将,到时候”如:

(3)That boy will learn that in time .

第二种选择是 at one time 通常也有两层意思。一是“曾经,一度”,如:

(4)You worked for them, didn't you, at one time ?

二是“同时”,如:

(5)Let's start the dance again, at one time .

第三种选择是 at the same time ,通常意谓“同时”,如:

(6)The two runners reached the finish line at the same time .

第四种选择是 on time ,常意谓“按时”或“准时”,如:

(7)The train arrived at the station on time .

(8)He's always on time .

基于上述分析,这一道题的答案自然应选A,即 in time (作“终将”解)。