It is such fun.
たいへん楽しい
It is supposed that his death was an accident.
彼は事故死だと思われている
It is sure to rain.
きっと雨が降る
it is tempting to do
つい…したくなる
It is the last straw that breaks the camel's back.
((諺))ラクダの背骨を砕くのは最後の一本のわらだ
It is the least I can do for him.
それが彼にしてやれるせめてものことだ
It is the only sure method of success.
それがうまくいく唯一確実な方法だ
It is this aspect that I am going to tell you about.
あなたに言いたいのはこの側面に関してだ
It is three hours' drive [a three-hour drive] from here to the town.
町まで車で3時間だ
It is tiresome of him to come incognito.
名前を隠してやってくるとは彼もいやなやつだ