013 不定詞(infinitives)⑥ 程度を表す不定詞の形式、be動詞＋不定詞の形式
程度を表す不定詞の形式（不定詞の副詞的用法）
too （形容詞・副詞） to ～ 「あまりに（ ）で～するいことができない」
（形容詞・副詞）enough to ～ 「～するには十分（ ）だ」
so （形容詞・副詞） as to ～ 「～するほど（ ）だ」
≒so （形容詞・副詞） that … 「とても（ ）なので…だ」
【例文】
1.It is too cold to swim in the sea.
＝It is so cold that we cannot swim in the sea.
2.That curry was too hot (for me) to eat.
=That curry was so hot that I could not eat it.
3.It is too far to walk.
=It is so far that we cannot walk.
4.It was hot enough to go swimming.
=It was so hot that we could go swimming.
5.He is rich enough to buy a Prsche.
=He is so rich that he can buy a Porsche.
6.It is close enough to go on foot.
（歩いて行けるくらい近い）
=It is so close that we can go on foot.
7.She was so kind (as) to show me around the town.…ややかたい表現
=She was so kind that she showed me around the town.…that節内は時制の呼応
（彼女は親切にも私に街中を案内してくれました）
≒It was kind of her to show me aroud the town.
be動詞＋不定詞の形式（不定詞の形容詞的用法）
(be) to ～ （これからする）予定・義務／命令・（不）可能・運命・意図を表す
【例文】
8.The president it to visit Japan in November.…公式の予定等を表すかしこまった表現
cf."The next meeting it to take place in Italy."
9.New students are to attend the orientation session.…規則／強い命令（第三者が課す義務）、話者の意思による義務は通常should/mustで表す
10.Not a soul was to be seen on the street.
（通りには人っ子ひとり見られなかった）
soul=personの意、否定語を伴う場合が多い
to be 過去分詞＜受動態＞で可能（不可能）を表す
11.She was never to see him again.
（彼女は二度と彼に会えない運命にあった）
過去形で小説の中などで多く見られる表現
cf."He was never to return his hometown."
