如果表示簡單的兩個物體名詞并列,則可以互換
例：he needs not only an apple but also a pear．
＝He needs both an apple and a pear．
但要表示動作的并列,則不可以,both and不表示動作的發(fā)生.
She doesn't only draw well but also sings nicely ．
這就換不了了.