source: www.englishclub.com
= to solve, to find a sollution for our differences
[ verb + adverb ] = separable *
[ ahead, apart, aside, away, back, forward, home, out ]
| 2 PARTICLES (with adverb) = SEPARABLE* |  | Somebody took off the posters. | This is possible. |
| Somebody took the posters off . | This is also possible. |
[ verb + preposition ] = inseparable
[ after, against, at, for, from, into, of, out of, to*, with, without ]
| 2 PARTICLES (with preposition) = INSEPARABLE | | Who is looking after the baby? | This is possible. |
 | Who is looking the baby after? | This is not possible. |
For example, we must say "look after the baby". We cannot say "look the baby after"
[ verb + adverb + preposition ] = inseparable)
[ this is a 3 PARTICLES verb ]
| 3 PARTICLES = INSEPARABLE | | They will come up with a solution. | This is possible. |
| They will come up a solution with. | This is not possible. |
* * Separable Phrasal Verbs
If phrasal verbs are transitive (they have direct object),we can usually separate the two parts.
For example, "turn down" is a separable phrasal verb.
We can say: "turn down my offer" or "turn my offer down". Look at this table:
| transitive phrasal verbs are separable | | They | turned | down | my offer. | |
| They | turned | my offer | down. |
BUT, if phrasal verbs are not transitive, they have no object, so we have no choice:
we cannot separate the two parts, because we have NO DIRECT OBJECT for doing that.
| transitive case ------------------------------------ intransitive cas | | The girl | took | her coat | off. | |
| The plane | took | off. |
AND, if the direct object is a pronoun, we have no choice. We must separate the phrasal verb and insert the pronoun between the two parts. Look at this example with the separable phrasal verb "switch on":
| direct object pronouns must go between the two parts of transitive phrasal verbs | | John | switched | on | the radio. | These are all possible. | |
| John | switched | the radio | on. | |||
| John | switched | it | on. | |||
| John | switched | on | it. | This is not possible. |
*Here are some phrasal (verb+adverb) that have inseparable use. One interesting thing to notice about these is that
if they are separated, their meaning changes.
take offThe plane will take off in a couple minutes.
I'm going to take my coat off.
get up
I usually get up at 7:00.
I will try to get the website up by this afternoon.
break down
My car broke down yesterday.
I need to break this cardboard box down before I can recycle it.
get around
I always try to get around the rules.
I can never get the boat around that bend in the river.
catch on
I'm starting to catch on to this concept.
I caught him (cheating) on his test.
bring up
I don't want to bring up that topic again.
Could you bring those papers up before you leave?
These are definitely not all the inseparable phrasal verbs but instead those which came to mind easily. Again, I don't think I could give you a complete list. I know that some dictionaries will tell you whether a verb is separable or not, so that might be your best bet.
There's a good discussion about this HERE.
And there are many other cases of phrasal.
Here you have some examples with the verb TAKE:
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Obs.: Some particles can be adverbs or prepositions
so in some phrasal verbs they are separable and in some they are not:
about, across, along, (a)round, before, behind, by, down, in, inside, near, off, on, outside, over, past, through, under, up.
With these you just have to learn if the particle is separable or not. The same phrasal verb can be separable in one meaning and inseparable in another.
"she got in the car. she got in it"
"she got in the washing. she got the washing in. she got it in"
"Sometimes you can use logic to determine whether a separable verb is separable or inseparable.
("She got in the car" is clearly different from "She got the car in".)
However, you generally have to play it by ear."
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TIP: If you are not sure whether a phrasal verb is separable or inseparable,
DO NOT separate. In this manner, you will always be correct!
source: www.englishclub.com
and esl.about.com
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