(1) My grandfather's hobby is to collect antiques.
→ collecting

(2) All you have to do is waiting here.
→ (to) wait

(3) One of the most important purposes of learning a foreign language is communicate in that language.
→ to communicate

(4) It is impossible that you look after the child.
→ for you to look

(5) It us important that she knows this fact.
→ for her to know
→ that she (should) know

(1) 今や日本人選手が大リーグで活躍するのは珍しくなくなってきた。
    These days, it is not unusual for Japanese baseball players to succeed in the major leagues.

(2) 若いうちに異文化に触れることは貴重な経験でる。                                                                                   
  It is a valuable experience to learn about different cultures when you are young.

(3) 日本のビジネス界では、初対面の人と名刺を交換するのが習慣として定着している。
  In the Japanese business world, it is customary to exchange business cards with those you are meeting for the first time.

(4) ただ一つのエネルギー源に頼るのは危険だ。
  It would be risky to depend on only one energy source.

(5) 我々の社会では、父親が母親と同じくらい子育てに関わることは、まだ難しいかもしれない。
  In our society, it may still be difficult for fathers to be as involved inrasing children as mothers.


(1) 海外で日本語を教えていて一番有難いのは、学生の素朴な質問に触発されて日本語や日本人に関して教師の我々自身が思いもかけない発見をすることである。
  The best thing about teaching Japanese abroad is that when asked by students simple questions about Japanese and Japanese people, we often make unexpected discoveries we have never thought of.

(2) 土地の値段が日本一と言われる目抜き通りの木に、カラスが巣をつくるなんて、なかなか賢い。
  It is very clever of that crow to build his nest in a tree on a busy street where land price are said to be the highest in Japan.

(3) 上下関係を大切にする日本社会において、外国から来た人が戸惑うことの一つに、日本人は極めて控えめに自己をPRすることがあげられる。
  One of the most bewildering things for foreigners who comes to Japan, where pecking orders are highly stressed, is that Japanese advertise themselves too modestly.

(4) 会話のもう一つの目的が意見交換であることを考えると、英会話のスタートは、まず自分の意見をしっかり持つことだといえます。
  Considering that one of the main purposes of conversation is to exchange ideas, the forst thing to do before starting to speak English is to have your own opinions.

(5) 教育のもっとも重要な役割のひとつは、若い人が社会のどのような変化に対してもうまく対処できるように準備させることである。
  One of the most important roles of education is to enable young people to deal successfully with any changes in society.