这句话哪里错了,1.Healwaysarrivedathisofficeontimebefore.2.Roberthasstartedtouseacomputerwhenhewasanofficeworker.这两句话每句都有一处错误,请问错在哪,并说明原因.

Question

这句话哪里错了,
1.He always arrived at his office on time before.
2.Robert has started to use a computer when he was an office worker.
这两句话每句都有一处错误,请问错在哪,并说明原因.

Answer 1

第一句表达的是“他以前总是准时到办公室.”always 通常用于一般现在时,如果说过去常干某事,应该用used to do
该句应改为：He used to arrive at his office on time.
第二句主句谓语动词不能用现在完成时,只是单纯说过去的动作,应是一般过去时.现在完成时通常上过去发生的动作或存在的某个状态和现在有联系,要么是时间持续到现在,要么是其结果对现在有影响.应改为:
Robert started to use a computer when he was an office worker.