1. Notice the construction of the sentence 因为有时候，我们总是随便答应别人 自己没有能力做到的事情. It is common to see constructions such as 有时候，我们总是. The speaker is saying that in that particular situation, people always act this way. We see a similar usage in 因为别人总是都要猜你讲的话真正的意思是什么.

2. Since there are no direct words for “yes” and “no” in Chinese, alternate words like 是 and 非 are used in 口是心非.