Hi Shinia, it means there is not a chance that he will finish his assignment. The likelihood of this happening is very low. You can substitute this with "pigs may fly". Dan gave a good answer, you can refer to it. Hope this helps! Anyway, I'd be happy to help you with more idioms, phrases and sayings, and more in a class. Please check out my profile and let me know what you think :) P.S. I also know Chinese :)

It's a curious idiom, and it's a real idiom that is often used. I think the explanation is that a "month" is about thirty days, so "a month of Sundays" would mean thirty Sundays = thirty weeks. But "not in a month of Sundays" doesn't mean "thirty weeks," it means "not ever." It means the same thing as another idiomatic phrase, "not in a million years." It is impossible. No matter how much time he was given, he can't finish it. The sentence does not hint at a reason. It could be that the assignment is just beyond his abilities. That's likely. It could mean someone has unfairly given him far too much work. That's possible. The word "cannot" means he is not able to do it. So it does not suggest laziness. A lazy person is able to do something, they just refuse to do it. By "protracted," do you mean "slow?" That isn't likely, because the expression "not in a month of Sundays" means "not ever."

Does it mean that he is too lazy? No, it just means that there is no chance that he will complete the assignment in time. Not in a month of Sundays indicates that the chances of something happening are extremely small - or even non-existent...

Hello, It means it is highly unlikely that he will ever complete this assignment. I hope this answers your question. If you’d like to practice speaking. I’d be happy to help you develop a study plan. Feel free to view my teaching profile and class offerings and send me a message if you think I can help you. Regards.

It means very unlikely to happen. His assignment will not be completed or it's very unlikely that he will complete it.