The sun is much bigger than the earth。

　　错误：The sun is more bigger than the earth。

　　She is by far the cleverest girl in our class。

　　by far 到目前为止

　　Its becoming the third largest city in the country。

　　They have many more chemistry books than we。

　　There is much more water in this jar than that one。

　　They will come back a little earlier。

　　This time she ran a good deal faster。

　　Tom is six centimeters taller than John。

　　Of all the workers in the factory， Alice is by far the most skilled。