is of the same size as 和 is the same size as 有何区别?

Venus is of the same size as Earth.因为size是名词,要加ofVenus is as big as Earth.= Venus is of the same size as Earth.一般情况 of+名词=对应的形容词,如 it is of use= it is useful那为什么可以说 That is the same girl as you saw yesterday. ？ girl 也是名词，为什么不加 of？首先be动词is后面可以接名词，也可以接形容词，That is the girl. 就是一个主谓宾的结构。其次只有height（高度），size（尺寸），age（年龄）等词才会和of连用最后通常两者以上比较的时候才用of the same（拥有相同的）they are of the same age 他们年龄一样（他们两者比较）Venus is of the same size as Earth.（威尼斯和地球两者比较）请用一句话回答我：什么时候用 be of the same ... as... （即带of的），什么时候用 be the same ... as ...（即不带of的）？be动词后面接形容词，如果不是形容词，就要用of+名词变为形容词