Elementary Latin: Could you help me check my Latin homework? (I'm self-studying)?

I'm assuming the dashes after some words are "long marks" or "macrons"? If so:

1) Correct. "We call the sailor".

2) Correct. "I watch the sailor". Creepy, but correct.

3) Incorrect. (sort of). Generally, the word c-u-m should go before the word it modifies (in this case, "nauta-". (I walk with the sailor)

4) Incorrect. Firstly, it should be "fabulas", as it's accusative (object of the verb "tell"). Secondly, the word "tell" implies a plural subject (if it were singular, it would be "tells"). So it should be "Nautae fabulas narrant" - "The sailors tell stories". Keep an eye on your plural vs. singular verbs!

5) Correct. The huts of the sailors are large. Note the ambiguity of this sentence: it could also be translated as "The huts are large sailors", and the only thing that prevents this translation is logic.

6) Correct. Dative of respect. "The island is dear (with respect) to the sailor".

7) ALMOST correct. You just forgot your verb! "Poeta prope nautam est." - "The poet is near the sailor".

8) Correct. Nautae is the indirect object, and thus is in the Dative. "I am giving the money to the sailor".

9) Incorrect. Firstly, I think "propinqua" is actually an adjective, and thus it cannot modify "sailing" (which it needs to do here). If we leave the adjective form here, it would have to be "propinquam", and it would say "we are sailing the nearby sailors" (i.e., we're sitting on the sailors, who are floating in the sea). Instead, use "prope", which in fact is an adverb. In the sentence above about the poet, the poet is "being" (i.e., existing) near the sailor, so "prope" is an adverb in that sentence modifying "is". Secondly, the first person plural of "navigo" is "navigAmus", not "navigOmus". "Nautae prope navigamus" - "We are sailing near the sailors"