What's the grammar behind 〜がいなくて寂しい


I can't understand how 「いる＋寂しい」 means "to miss something" like in
「君がいなくて寂しいよ。」.




> 「君{きみ}がいなく **て** 寂{さみ}しいよ。」

「いなくて」 is the te-form of 「いない」. (「いない」, of course, is the negative form of
「いる」.)

One of the functions of the te-form is to express a **_cause-and-effect_**
relationship. Thus, 「いなく **て** 」 in this context is pretty much synonymous to
「いない **ので** 」 and 「いない **から** 」.

Cause: 君がいない ("You are not here.")

Effect: 寂しい ("I am sad.")

So, the sentence literally means:

> "I am sad because you are not here."

A freer translation would be:

> "I am missing you."




> 「君{きみ}がいなく **て** 寂{さみ}しいよ。」

「いなくて」 is the te-form of 「いない」. (「いない」, of course, is the negative form of
「いる」.)

One of the functions of the te-form is to express a **_cause-and-effect_**
relationship. Thus, 「いなく **て** 」 in this context is pretty much synonymous to
「いない **ので** 」 and 「いない **から** 」.

Cause: 君がいない ("You are not here.")

Effect: 寂しい ("I am sad.")

So, the sentence literally means:

> "I am sad because you are not here."

A freer translation would be:

> "I am missing you."

