误He jumped off from the train before it had quite stopped moving.
正He jumped off the train before it had quite stopped moving.
析说“跳离…”是jump off, off在这里是介词,其后接宾语,不需再接from。
听到这个消息,我们高兴得跳起来。误We jumped with joy at the news.
正We jumped for joy at the news.
析“高兴得跳起来”是jump for joy, for在这里表示原因,不可换为with。