1. This lesson features many uses of the word 答应. However, notice how the word can vary in meaning from “commit” to “agree” to “promise”, as seen in the following examples:
a. 我不得不答应.
b. 最后他总算答应了.
c. 答应别人了以后就不再改变.

2. 找 can also mean “invite”, as seen in 比如说今天晚上你只想待在家里，不想去任何地方. 但是你的同事突然找你一起去一个派对，可是你想不到理由来拒绝他，你就可以这么说.

3. 经过 has a more abstract meaning of “encountering”, as seen in 不过经过你的努力，并且试着让对方了解答应这件事情的好处，最后他总算答应了.