(12)a. Jason praised Maria more highly than I.
b. Jason praised Maria more highly than me.
(12)a和b都被接受，但(12)a等于(13)a，而(12)b等于(13)B：
(13)a. Jason praised Maria more highly than I did (= I praised Maria).
b. Jason praised Maria more highly than he praised me.
显然，这两句的深层意思大有差别。遇到这种情形，为了避免误解，不妨根据要表达的意思用完整的句式表达出来。换句话说，必要的话，要用(13)这句子。
不然，把(13)a变成(14), (13)b变成(15)也可：
(14)I did not praise Maria as highly as Jason did.
(15)Jason did not praise me as highly as he praised Maria.
