Question

一道SAT语法题

34. The Bactrian camel is well adapted to the extreme climate of its native Mongolia, having thick fur and underwool that keeps it warm in winter and also insulate against summer heat.
and also可以连用吗？张一冰语法书中说不可以用，但是这里为什么就用了呢

Answer 1

这句话里的also照句意理解应该是副词，表示“同样、也、而且”。并且and和also 在这里不是连用的词组，要分开来看（虽然题目这样给选项），and连接的是前后两个句子。整句话翻译过来：双峰驼很好的适应了蒙古本土的极端恶劣的天气。它厚重的外皮毛和内层绒毛能在冬天保持温暖“而且”（即also）在夏天能抵御高温。（and作为连词在这里没有实际意义，不翻译出来。为了方便lz理解，所以此句就逐字翻译了）

所以这句话里真正恶心的是keeps，应该改成keep，因为前面是两个名词，and前后并列动词需要一致，根据后面的 insulate，判断keep的动作的主语也是thick fur and underwool。

Answer 2

你好。完全可以啊。例如：
She is my teacher and also a good friend of mine
==She is my teacher as well as a good friend of mine
===She is my teacher and a good friend of mine as well.
===She is both my teacher and a good friend of mine
===She is not only my teacher buy also a good friend of mine.
张一冰语法书中说de不可以用，或许是其它语境吧？