In Numbers^x, Gerunds^x, Determiners^x

Hello, this is my first post here, I like to know these words kilometer centimeter Are those words noun if they are standing alone ? if it's, what kind of noun it's, proper noun or abstract noun or etc ? After that, I want to indentify the part of speech of the following setence by using the...

What is the word sucks in " Homework sucks " ? Is it a verb or an adjective? If it is a verb, what does homework suck? This brings up an excellent point, and a wonderful opportunity to discover the beautiful syntactic structure of the English language. The question at hand is " Does an English...

I would say only the first sentence is correct. 2 and 4 are incorrect because you need a gerund to modify a noun. Number 3 is incorrect too because it lacks a determiner. You would need "a" .