と (4)

Conjunction (Basic 480)

A subordinate conjunction which marks a condition that brings about an uncontrollable event or state.

Equivalent: If; when

ニューヨークに行く面白い店が沢山ある・あります。
If you go to New York, there are many interesting shops.
それは先生に聞くすぐ分かった。
I understood it immediately when I asked my teacher.
タイヤは古い危ないですよ。
Tires are dangerous if they are old.
魚が嫌いだ日本へ行った時困りますか?
If you don't like fish, will you have trouble when you go to Japan?
学生だ割引があります。
If you are a student, there is a discount.

Formation

{V/Adjective (い/な) Noun+copula} informal nonpast  
  話す If someone talks
  高い If something is expensive
  静かだと If something is quiet
  先生だと If someone is a teacher

Notes

1. In Sentence1Sentence2, Sentence1 must be nonpast even if it expresses a past event or action, as in Example (a). Tense in expressed in Sentence2.

2. In Sentence1Sentence2, Sentence2 cannot be a command, a request, a suggestion, an invitation or a volitional sentence. The following sentences are all ungrammatical.

(1)

⎧a. 来なさい。
仕事が早く終わる私のうちに ⎨b. 来てください。
⎪c. 来たらどうですか。
⎩d. 来ませんか。
⎧a. come to my place.
If you finish your work early, ⎨b. please come to my place.
⎪c. why don't you come to my place?
⎩d. wouldn't you like to come to my place?

(For the correct structures, see たら, Note 4.)

★Semantic Derivations of と

と 'with'― →[Accompaniment] と2
太郎は花子と踊った。
Taro danced with Hanako.
⤷[Reciprocal relationship] と2
これはあれと同じだ。
This is the same as that.
と 'with'― →[Exhaustive listing] と1
僕は刺身と天ぷらを食べた。
I ate sashimi and tempura.
と 'with'― →[Direct quote] と3
トムは「こんにちは。」と言った。
Tom said, "Konnichi wa".
⤷[Indirect quote] と3
トムは学生だと言った。
Tom said that he was a student.
⤷[Thought] と3
一郎は大丈夫だと思った。
Ichiro thought that there would be no problem.
と 'with'― ⤷[Sound symbolism] と3
太郎はバタバタと走った。
Taro ran with a clattering sound.
⤷[Manner of action] と3
花子はじっと待っていた。
Hanako was waiting quietly.
と 'with'― →[Condition of noncontrollable occurence] と4
ニューヨークに行くいいレストランがある。
If you go to New York, there are good restaurants.