discontinue
1.discontinue（中止）后面接动名词比接不定式普通，如He soon discontinued writing to me比He soon discontinued to write to me普通。
2.continue（继续）是连续的动作，但discontinue通常是一时的动作。如假定你从3点钟到9点钟连续写字，在9点钟停止，continue 6小时，在9点钟那一时刻discontinue了，可以说I continued (to write) for six hours, and discontinued at nine o'clock。但偶尔也指“持续地停止”。例如：After his illness he discontinued writing for nearly five years.
