就像这句话：Self-employed people may be find it hard to have an accurate concept of time compared with when they worked for companies or organisations because they don’t have to follow the fixed working time from 9 a.m. to 6 p.m..
我写这句话想表达的意思是：和在公司上班相比，自由职业者往往很难有准确的时间观念因为他们并不需要每天从早上九点工作到晚上六点。
这里的when可以表示当…的时候这个意思吗？如果不行该怎么改进呢？