1. The other robber forced me back to the safe.
(What is the part of speech of 'back' in the sentence?)
2. He was carring the glass necklace and started down the stairs.
3. He was carring the glass necklace and started coming down the stairs.
4. He was carring the glass necklace and started going down the stairs.
5. He was carring the glass necklace and started moving down the stairs.
(What does #2 mean, #3, #4,or #5?)
In 1, "forced back" is considered a phrasal verb. Here is a really good explanation:
http://grammar.ccc.commnet.edu/grammar/verbs.htm#phrasal
Click on HERE for a long list.
And here's another website where you can find lists and lists of these verb phrases:
http://www.eslcafe.com/pv/
Yes, 2 - 5 all mean about the same thing. NOTE THE SPELLING ~~> carrying
1. In the sentence "The other robber forced me back to the safe," the word 'back' is functioning as an adverb. It modifies the verb 'forced' and indicates the direction or movement of being forced by the other robber.
2. In sentence #2, "He was carrying the glass necklace and started down the stairs," it means that the person began descending the stairs while holding the glass necklace.
3. Sentence #3, "He was carrying the glass necklace and started coming down the stairs," suggests that the person was in the process of descending the stairs towards the speaker or a specific location.
4. Sentence #4, "He was carrying the glass necklace and started going down the stairs," implies that the person simply began descending the stairs without any specific direction or destination mentioned.
5. Sentence #5, "He was carrying the glass necklace and started moving down the stairs," indicates that the person initiated movement down the stairs with the glass necklace. The emphasis here is on the action of moving rather than specifically walking or going down.