as soon as

・"as soon as"は「~するとすぐに」という意味。"as"に導かれる文は副詞節なので、未来のことは現在形で表す。
・主節の動詞が過去形のとき、"as"の後の動詞は過去形ないしは過去完了形になる。

[正]I'll call you as soon as I see him.
[誤]I'll call you as soon as I will see him.
[正]As soon as I saw him, I began to love him.
[誤]As soon as I see him, I began to love him.

as soon asの関連項目