1 I felt relaxed lying in the sun.(这里lie为什么要变为现在分词啊)

1. I felt relaxed (when I was) lying in the sun.
2. Dave went through his pockets (when he was)looking for the keys.
这里的ing形式表示的是一种状态
3. 关於这个笔记,我只知道这四个动词都是可以和up搭配使用的.
go up: go up stairs
turn up: turn up the radio
pick up: pick up a book
make up: make up his mind
I will make it up to you. (我会补偿你的）不过这个说法比较口语,不知道考试能不能用.
希望能帮到你吧~