This is my first question here. I normally participate in ELU. This question was posted yesterday https://english.stackexchange.com/q/289903/129806. The OP asks why They build a house next to mine. is not correct. The accepted answer is not acceptable to me. John Lawler's answer is more in the right direction (could be a great answer, however I am not able to see that because it assumes understanding of things which I am not completely clear on yet.)
It seems to me that in the above sentence there is a conflict between the lexical aspect of build and how the verb is being used in the sentence.
1) I'd like to say "There is a conflict between the lexical aspect of the verb and it's grammatical aspect." however I am not sure if I am using the term "grammatical aspect" correctly. Am I? What exactly is the difference between lexical aspect and grammatical aspect?
2) I can see that there is a difference between a verb's lexical aspect and how it is used in a sentence but often it seems that the use of the verb in a sentence changes it's lexical aspect. For example, in looking online, I see that sources say "build" is an accomplishment verb and that it is telic. However, in the sentence, "They build houses for a living." the verb doesn't have that "accomplishment" sense but seems to make it an "activity" verb. It also seems to be atelic in the sentence. What's going on here?
I'm motivated to ask this because as an ESL teacher teaching students whose native language is Chinese it is a daily occurrence that students use verbs incorrectly and don't seem to have an understanding of verbs and their lexical aspect which we as native English speakers have. So, a student will say "I write a book today." or "I am working in the R&D department." (but they don't mean it in the "Just doing this for a few weeks while my colleague is on vacation" sense.) And, the question from ELU that I linked is a common one, and I would like to develop a good and meaningful explanation to help students understand this.