I agree with the other person: Although technically correct, it doesn't fall natural when speaking. Also, the sentence is technically a cause and effect type of question, so the "and" is actually what you would want to change. My fixes would be one of the following: -Since I have not finished it yet, there is still a lot of work to do. -Because it hasn't been finished, there is still a lot of work to do. -There is a lot of work to do because there are things still left to be finished. -I haven't finished it yet, so there is still a lot of work to do. However, if you wanted to stick as close to the original as possible, you could also do: I have not finished it yet and because of that, there is a lot of work left to do.

I have not finished it yet and there is a lot of work to do with it. It is almost correct - everyone will still understand you, but it doesn't sound natural. "I have not finished it yet" Perfect "...[and] there is still a lot of work to do with it." You don't need to say 'with it' - you already implied what the object was when you said "I have not finished IT yet". You are right! If you want this to sound natural, omit the 'and' too: "I have not finished it yet, there is a lot of work to do." Leaving 'and' in is perfectly valid, but removing it makes the sentence 'flow' better. A little extra- This is one of those cases in English where context decides everything. Depending on whom you are speaking to, the sentence can have several forms: "I have not finished it yet, there is STILL a lot of work to do." -implies the work is ongoing, and that you are STILL doing it! "I have not finished yet, there is a lot of work to do." -Almost identical to above. Removing 'it' generalizes the sentence, as if you have several tasks to do, and they are not all finished. "I have not finished yet, there is STILL a lot of work to do." Same as above - there are a lot of tasks to do and they are not all finished, but you are STILL working on them! You might use this if you have a lot of homework to finish, and you are currently working on it. "I have not finished it yet, there is a lot of work to do." The example you gave. This makes the most sense when referring to one specific task which you are not currently working on - imagine you are writing a book, and I am talking to you when you are walking your dog in the park: Me: "Have you finished your book yet?" You: "I have not finished it yet, there is a lot of work to do." You are telling me that it (the book) is not finished, and that writing the book needs a lot of work.