Put the book back on the table.
I'm having trouble. I think it is a preposition.
Put the book back on the table.
I'm having trouble. I think it is a preposition.
First, and most important, asking what part of speech a particular word is tells you nothing about it, or about grammar, or about English. Nothing. Even if you get an answer. It's the wrong question.
Second, put back is a Phrasal Verb, and the back part is generally called a "particle". (See what I mean about telling you nothing?) The put part is called the "verb", which is also not terribly useful.
Phrasal verbs consist of a "verb" plus a "particle", which usually has the same form as a preposition, but doesn't have an object. Some linguists call it an "intransitive preposition", which means a preposition without an object. But the verb + particle unit acts together like a verb.
There are far more phrasal verbs than non-phrasal verbs in English, because every verb has several particles that it can occur with in a phrasal verb, with mostly unpredictable meanings.
It serves the function of controlling/modifying the verb put, so it is an adverb.
A preposition is a part of speech used to connect a noun or pronoun. Back is obviously not used in this way here. The only preposition here is on, as it connects the noun phrase the table.
I knew the answer but I had to confirm with my MAC AIR built-in Dictionary. Allow me to simplify.
The word back has 4 uses in speech;
Consider re-phasing your sentence so the meaning is the same, when in doubt.
You get a point, if you can choose the correct answer easier this way.
The analysis of structures consisting of what I'll start by calling a verb + an adverby- or prepositiony- word, is difficult.
Sometimes (perhaps most often), as John Lawler indicates, it is best to consider the whole structure - even if there may be / must be intervening words - as a unit. This then constitutes a multi-word verb (MWV). Often, there is a single-word paraphrase,
eg the plane touched down = the plane landed
though there doesn't need to be:
Big Al knocked Elliot out (unless one allows KO'd). Notice that the verbs touched and knocked would not carry the same meaning (in fact touch cannot be strictly intransitive).
However, this is not always the case.
Although 'put the book back on the table' has a single-word verb equivalent ('replace the book on the table'), the very similar 'pass the book back to Tom' and 'kick the ball back under the table' have not. It seems illogical to argue that 'put back' is much more firmly bound than 'pass back' and 'kick back' are here. In the latter examples, the back arguably modifies (further describes) the process described by the bare verb. One could also argue that it describes the resulting state (which is an adjectival function!)
In 'Back on the table, the book was soon spotted by the boy who had left it,' the issue is further complicated.
V+Ptconstructions. (c) You can tell a true phrasal verb by whether it governs Particle Shift, which equates put the book back, put back the book, and put it back, but disallows *put back it. It's a syntactic constituent, not a sequence of words. – John Lawler May 24 '12 at 00:05