after the alarm had been given,the great ship turned sharply to aboid a direct collision为什么after the alarm had been given要用过去完成时,直接用过去时不可以吗,而且given这里表达的是什么意思呢?

after the alarm had been given,the great ship turned sharply to aboid a direct collision为什么after the alarm had been given要用过去完成时,直接用过去时不可以吗,而且given这里表达的是什么意思呢?
after the alarm had been given,the great ship turned sharply to aboid a direct collision
为什么after the alarm had been given要用过去完成时,直接用过去时不可以吗,而且given这里表达的是什么意思呢?

after the alarm had been given,the great ship turned sharply to aboid a direct collision为什么after the alarm had been given要用过去完成时,直接用过去时不可以吗,而且given这里表达的是什么意思呢?
应为后半句的动词 turned 是过去式 而 the alarm 被给是turned这个动作发生之前发生的 所以用过去完成时 这里given的意思是被送出

因为就是说的“过去完成”啊，对应于后来的the ship turned. 船转弯是个过去的事情，而那个alarm又是在这个过去的事情之前发生的/完成的。