1.be determined to 下定决心做...
You must be determined to change the past live.
必须要下定决心以改变你过去的生活方式。

2.walk through 走过
It took me so long to walk through the deep snow.
在深深的雪地里行走花了我很长时间。

3.wade through 涉水；努力完成
I've finally managed to wade through that boring book I had to read.
我终于很吃力地读完了必须读的那本讨厌的书。