～するのはよくあることだ: It's not uncommon for someone to〔人が〕 ～が…するのはよくあることだ: hardly unusual for ~ to ～するのは（人）にはよくあることだ: It's typical of someone to それはよくあることだ: Such things often happen. ～にはよくあることだが: 1. as in the case with 2. as is usual with 賢い者にばかな子どもが生まれるのはよくあることだ。: A wise man commonly has foolish children. こんなことはよくあることだ。: This is one of those things. この辺りではよくあることだ: be common around here 場合にはよくあることだが: as is often the case with〔～の〕 女房との口論はよくあることだ: A wordy conflict with my wife is a common occurrence. 学生にはよくあることだが: as often happens with students よくあることだ: 1. It's nothing unusual. 2. It's the old story. 3. That's typical. 4. happen often よくあることだ。 1. That happens often. 2. That kind of thing is common. よくあることだ。: 1. That happens often. 2. That kind of thing is common. よくあることだ 1. It's nothing unusual. 2. It's the old story. 3. That's typical. 4. happen often よくあることだが: as is often the case これはよくあること: This occurs very often.
