Is たらと some form of conditional?


In a book I found this sentences, which I can't quite understand:

> この熱意を勉強に向けてくれ **たらと** ため息をつくこともしばしばだが、自分でも覚えのあることだから、滑稽と笑うことはもちろんできない

The part which puzzles me the most is `たらと`, which seems like two
conditionals, but I can't understand nor find its meaning.




Welcome to Stack Exchange, and thanks for your question!

To answer your question, no, たらと does not represent two conditionals together.
The と here is being used as a quoting particle, while the たら is the usual
conditional. The verb that follows the と is the expression ため息をつく, which means
"sigh" or "breathe a sigh". As such, what comes before the と marks _what the
speaker is sighing about_.

I can understand why reading this is a bit confusing: the たら should typically
lead onto another clause stating the result. But, perhaps exactly because he's
sighing (which suggests this is an internal monologue that doesn't have to be
fully formed), or because the logical conclusion of the thought is fairly
obvious (that it would be _good_ if the person the speaker is talking about
could put the same enthusiasm into studying), the speaker doesn't finish the
sentence. Ending a sentence on たら has the sense of "If only ...".

It might be easier to parse this clause if I add punctuation as follows:

> 「この熱意を勉強に向けてくれたら…」とため息をつくこともしばしばだ。

Putting this all together, you might translate it as:

> I often sigh "If only he could put this (sort of) enthusiasm into his
> studies...".

Hope that helps to clarify your understanding of the sentence.




It's conditional-たら followed by **quotative** -と. Adding some punctuation
should help you parse this correctly:

> 「この熱意を勉強に向けてくれたら」と、ため息をつくこともしばしばだ。  
>  It's common for me to sigh, thinking "If only he channeled his passion to
> studying!"

  * You can end a sentence with たら/れば/etc to say "If only ～!". 
    * [How do you say "If only things were different"?](https://japanese.stackexchange.com/q/53640/5010)
  * Quotative-と may be used without a corresponding verb, in which case you can assume ～(と)思って or something is omitted. 
    * [だろうと how can I translate it?](https://japanese.stackexchange.com/q/45089/5010)

