It is disappointing that they should have done such a thing.
彼らがそんなことをしたとはがっかりだ
It is doubtful that the missing child will ever be found.
その行方不明の子どもが見つかる見込みは薄い
It is doubtful whether [if] he will pass.
彼が合格するかどうか疑わしい
It is easily the best decision I have made in my life.
間違いなくこれまでで最良の決断だ
It is easy to make a man one's friend, but hard to keep him so.
友人をつくるのはたやすいが友情を保つのはむずかしい
It is easy to pronounce Italian.＝Italian is easy to pronounce.
イタリア語の発音はやさしい
It is enough for me to see you.
会えるだけで十分だ
It is entirely [particularly, highly] appropriate that ...
…ということはまったく［特に，きわめて］妥当だ
It is essential 「that you (should) do it yourself [for you to do it yourself].
自分でやるのが肝要である
It is extraordinary that he should not understand.
彼にわからないとはあきれたことだ
