The man kept his eyes ____ on his baby for quite some time.
A fixed B being fixed
请问这里为什么用A ，非谓语动词做宾语不是只可以用to do 或 doing 吗？
The man kept his eyes ____ on his baby for quite some time.
A fixed B being fixed
要解决网友这个问题，需要从 keep 的使用方法谈起。涉及到本句，keep 有两个句型需要讲：
keep + 宾语 + doing
keep + 宾语 + adj.
（纠正一下网友这个说法：非谓语动词做宾语。这里，his eyes 是宾语，目前分词或形容词作宾补）
语法规则是：在目前分词或形容词作宾补都允许的状况下，大家直接用形容词作宾补，而不需要 “being + 形容词” 作宾补。这是语言追求简练的基本需要。比如：
We found him lying on the floor. （正）
We found him very excited.（正）
大家不说：
We found him being very excited.（误）
又如：
They kept him working all day.（正）
They kept him busy all day.（正）
大家不说：
They kept him being busy all day.（误）
同理：
The man kept his eyes moving for quite some time.（正）
The man kept his eyes fixed on his baby for quite some time.（正）
大家不说：
The man kept his eyes being fixedon his babyfor quite some time.（误）
