先生は、生徒が最初に実践的な例を加えて解答を補完することを提案した。

The teacher suggested that the student first supplemented his answer with a practical example.

もし教師たちが授業に実践的な例を加えたなら、生徒たちは概念をよりよく理解できたでしょう.

If the teachers complemented the classes with practical examples, the students would better understand the concepts.

もしあなたが実践的な経験で履歴書を補ったなら、就職市場でより良い機会を得られただろう。

If you had complemented your curriculum with practical experience, you would have better opportunities in the job market.