The first sentence, "This is a lot of work," is grammatically correct. The second sentence, "This is lot of work," is grammatically incorrect because it's missing the article "a." It should be: "This is a lot of work." The difference is in the presence of the article "a," which is necessary for grammatical correctness.

"This is LOTS of work" "Lots" and "a lot of" are equivalent. I do not know why this is so - it just is. You cannot substitute "lot" for "lots".

The two sentences you provided have some typographical differences that affect their meaning and readability. Here's the breakdown: "tlThis is a lot of work": It appears that there might be a typographical error at the beginning of the sentence. "tl" does not form a coherent word or phrase in English. It seems like a mistake or typo. "This is lot of work": In this sentence, there is also a missing word. The word "a" is missing before "lot." The corrected sentence should be: "This is a lot of work." The corrected sentence "This is a lot of work" means that the task at hand requires a significant amount of effort or labor.

" This is a lot of work " CORRECT " This is lot of work" INCORRECT: LOT needs an article.