Underline the prepositional phrase in each sentence below.

5. The girl look behind the door for her friend-I feel that behind the door would be the prepositional phrase
6. Don't leave without your coat. -Underline without your coat.
7. During lunch we had a basketball tournament.-underline During lunch
8. The car traveled at a high speed.-underline at a high speed

Would you please be so kind as to check my answers on the above an let me know if I a wrong on any of them. Also point out any mistakes if possible and why?

Thank you

9. For a fraction of the cost you can buy a watermelon.

10. The boy tried to finish the race at any cost.
11. At noon we all went to lunch.
12.He is in jeopardy of not graduating.

9.Underline For a fraction
10. Underline at any cost
11. Underline at noon
12. Under in jeopardy

Can you take a look at 9-12 please?

Thank you for your help

The man sat on top of the reach from the boy

the phrase are not underline why

5. right - plus one more

6. right
7, right
8. right

For number 5 the sentence actually reads-The girl looked behind the door for her friend.

Would I just underline looked behind door? You somewhat confused me when you put plus one more.

No. I, for one, do not have to look up each phrase to find a prepositional phrase. I can recognize a preposition. If you know what a preposition does, you should be able to do the same. here are two sites that will help you understand the function of a preposition and the prepositional phrase:

http://www.grammar-monster.com/lessons/prepositions.htm

http://grammar.about.com/od/pq/g/prepositerm.htm

Thank you Mr. Reed I will definitely take a look at the two websites which you have recommended.

heather is in jeopardy of not graduating

That sentence has two prepositional phrases:

behind the door
for her friend

Ok. That one I would not have caught. They threw a trick one in there.

My question from the website Grammar Bytes is in the box where they have the list of prepositional phrases is that what you always look at to determine the entire prepositional phrase?