1. The deadline is coming up.

　　截止时间就要到了。

　　还能这样说：

　　It's getting down to the wire.

　　The work is due.

　　谚语：

　　Many a little makes a mickle.

　　积少成多。

　　2. I have to work overtime today.

　　我今天要加班了。

　　还能这样说：

　　I must work overtime today.

　　I need extra work today.

　　应用解析：

　　be on overtime 在加班;

　　overtime pay 加班费

　　3. I have to finish this up for tomorrow.

　　我必须把这个做完，明天要用。

　　还能这样说：

　　I must finish this up for tomorrow.

　　This has to be done for tomorrow.

　　应用解析：

　　finish因完成而结束;

　　complete全部结束;

　　end终止正在进行的事;

　　conclude按照预定予以终结

　　4. I have to work overtime today to get it done.

　　我今天不得不加班才能干完。

　　还能这样说：

　　If I want to finish it, I must work overtime today.

　　If I work overtime, I think I can finish it.

　　应用解析：

　　No sooner said than done. 说到做到。

　　Well done! 干得好!