好.我告诉你一个好办法.
Comets are just as much members of the sun's family as the other planets .
===Comets are members of the sun's family.The other planets are members of the sun's family,too.
just as much-- - - -as- - -- 在你的句子里面== too (也) ----------在这里充当连接词使用,前后的词性保持一致就可以了.不要多想.
又如：John is just as much tall as he is strong ===John is tall.He is strong,too.（前后都是形容词）
又如：Peter plays just as much as he works.（前后都是动词.）