Busy days

I could have finished finish my work if I work overtime tonight. In fact, I could never finish my work. My boss thinks I'm a working machine or maybe a superwoman....there is always more to do. Next week I'm going to shanghai for three days on business and I'm planning to visit a friend and then have a good rest there at the weekend. Hope nothing changes！

Busy days

I could have finished my work if I work overtime tonight. In fact, I could never finish my work. My boss thinks I'm a working machine or maybe a superwoman....there is always more to do. Next week I'm going to Shanghai for three days on business and I'm planning to visit a friend and then have a good rest there on the weekend. I hope nothing changes！

In this phrase, one clause is past tense, the other is present tense. Both should be the same. "I could have finished my work if I had worked overtime tonight," would be correct use of the past tense. "I could finish my work if I work overtime tonight," would be correct use of the present tense.