I need some help with the grammar in this sentence:

> ボストンに居たらなら、何で会いに来なかったんだい。

I understand the conditional -たら form and the なら conditional alone. But I have
not seen the two together.

Does the sentence simply mean If you were in Boston why didn't you come to see
me? If so, why are both conditionals used? Is this for emphasis?
CC BY-SA 4.0
2019-08-23T09:13:19.167
70287
2019-10-23T03:42:08.043
2019-10-23T03:42:08.043
9831
25491
question
conditionals
Use of ら conditional form plus なら
> 「ボストンに **居{い}たらなら** 、何で会いに来なかったんだい。」

「居た **ら** なら」 is incorrect. At least, it is highly substandard because there
is no point in using both 「たら」 and 「なら」.

The correct and standard forms would be:

  * 「居た **の** なら」

  * 「居た **ん** なら」 (informal form of above)

  * 「居たなら」

While it is true that a very small group of native speakers use 「たらなら」
occasionally, I would personally never recommend that Japanese-learners use
it. If one did, people would notice it.

The sentence means exactly what you stated.

> If so, why are both conditionals used? Is this for emphasis?

It is only a misuse; It is not for emphasis. Then again, people who use that
"double-if" may actually be aiming for emphasis. It beats me.
CC BY-SA 4.0
2019-08-23T11:28:47.857
70289
2019-10-23T03:18:17.937
2019-10-23T03:18:17.937
9831
70287
answer
The たらなら construction seems to be something that is in use. Examples like
居たらなら, 食べたらなら and others are easily found on the web, in fairly copious
numbers, as well as だったらなら, and even だったらならば.

だったらなら is mentioned in this [this thesis
paper](http://www.lib.kobe-u.ac.jp/repository/thesis2/d1/D1006989.pdf) about
guiding Chinese students of Japanese in the use of conditionals. In a section
that presents the finding that 26.79% native speaker subjects in its study
found だったら a bit unnatural compared to だったのなら, this sentence appears:

> 理由は「だったら」が「だったのなら」、「だったらなら」より少し不自然で、完全に使えないとまでは 言えないということであった。

The author seems to take だったらなら not only for granted, but as something a bit
more natural than だったら alone.

Conjecture: in rapid speech (早口), たらなら and たのなら can sound almost the same: the
の or ら just get a quick tongue flap. Also, the "o" sound in の is surrounded by
two "a" morae, so it pulls higher toward "a". It seems that the difference
between the two readily succumbs as a casualty when people are engaging in 早口.

Tongue twister time: さようなら、「たのなら」、これから「たらなら」。（＾＾）
CC BY-SA 4.0
2019-08-23T18:48:19.003
70293
2019-08-23T18:48:19.003
1266
70287
answer