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Im using [this
thread](https://japanese.stackexchange.com/questions/12795/whats-the-
difference-between-ga-and-o-when-they-are-used-to-designate-a-direc) for a
while as a base for choosing 'o' or 'Ga' particles, and most of the time I hit
correctly if there is a need for 'Ga' or 'Wa' particle.

However, I couldn't understand what is the difference between those sentences
that makes the use of 'Wa' over 'O':

```

    - doru o motte imasu.
    - doru wa takusan motte imasu.
    
```

Since the using of the particles depends not only on the verb, but on the form
of the verb, which are the same on both sentences - Can I assume that using
'Sukoshi' or 'Takusan' are preceded by 'Wa' particle?

Thanks for your help and for your time :)
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question
particles
Using 'Wa' and 'O' particles
(Does this _doru_ mean doll or dollar? For the sake of simplicity, let me
assume we are talking about a doll, because it's a very simple tangible noun.)

> Can I assume that using 'Sukoshi' or 'Takusan' are preceded by 'Wa'
> particle?

No, you cannot. The particle choice depends on the context, what you want to
focus in this particular sentence. The adverb _takusan_ does not affect the
particle choice. Let us remove that adverb for now and think about the
difference between the following two sentences:

  1. ドールを持っています。  
Dōru **o** motte imasu.

  2. ドールは持っています。  
Dōru **wa** motte imasu.

Both sentences are grammatical. Although these are both translated into
English as "I have dolls", in Japanese, you have to choose the correct
particle depending on the context.

As you know, 持つ _motsu_ is a transitive verb that basically takes an object
marked with を. But when an object is _topicalized_ , は replaces を. See [this
chart](https://japanese.stackexchange.com/a/17574/5010). So the first sentence
is a "plain" version, and the second one is a version where the object, _dōru_
, is marked as the topic of the sentence.

What does that mean? The は-version is used when _dōru_ has been already
mentioned in the conversation and you want to say something about it. You
don't introduce something into the conversation using a topic marker.

> A: (Do you have dolls? / We need some doll for the event tomorrow.)  
>  B: Dōru **wa** (takusan) motte imasu.

The を-version is used to introduce _dōru_ into the conversation for the first
time. Typically this is true when you start some story with this sentence, or
when you respond to a question where _dōru_ itself is the answer.

> A: (What's that in your hand? / What's your hobby?)  
>  B: Dōru **o** (takusan) motte imasu.

Again, the adverb _takusan_ is optional. It doesn't affect the particle
choice. In case you didn't know about the function of は as the topic marker,
please read: [What's the difference between wa (は) and ga
(が)?](https://japanese.stackexchange.com/q/22/5010)
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answer