1. Note how 当地 is used as a noun, rather than an adjective in the sentence 他本来住在美国，后来搬到中国，并且在当地教英文.

2. Note how to help someone, we can say “to help his busy”: 后来校长问老师们，有没有人愿意 在麦克先生上课的时候帮他的忙.