Which of these sentences is correct?

[njanja]

1 They came to America two years ago to study.
2 They came to America to study two years ago.

3 for a third time
4 for the third time

5 He`s a dark,tall,handsome guy.
6 He`s a dark,tall and handsome guy.

7 They wrote graffiti on the wall (s) of a house that said...

[matilda]

sentences 1 and 2 are both correct. adverb can come in various places.

between 3 and 4, only 4 is correct.

No idea about the rests

[spoon]

Originally Posted by njanja

1 They came to America two years ago to study.
2 They came to America to study two years ago.
3 for a third time
4 for the third time
5 He`s a dark,tall,handsome guy.
6 He`s a dark,tall and handsome guy.
7 They wrote graffiti on the wall (s) of a house that said...

In my opinion, I think not 1 but 2 is correct because adverbial phrases related to 'time' are usually located in the end of sentences.

And for 5 and 6, 'He is a hansome,tall,dark guy. You don't need to use 'and' among those adjectives because they are different types.

Note these....

a darling young man , a small round oak table, a dirty old brown car

an adventurous young man(*an adventurous and young man: different type of adjective)

a beautiful and brave guy( * a beautiful brave guy: same type of adjective)

and I highly recommed you to search for some examples relavant to your question in threads here.

I hope these help! ^.^