帮忙说一下这些单词的比较级与*expensive low thin clean bad early fat

expensive ` more expensive the most expensive
low lower the lowest
thin thinner the thinnest
clean cleaner the cleanest
bad worse the worst
early earlier the earliest
fat fatter the fattest

1.expensive ` more expensive the most expensive
2.low lower the lowest
3.thin thinner the thinnest
4.clean cleaner the cleanest
5.bad worse the worst
6.early earlier the earliest
7.fat fatter the fattest