She managed what amounted to a smile of satisfaction.

问题描述:

She managed what amounted to a smile of satisfaction.
这个句子的成分如何分析,就是主谓宾是什么,what amounted to做什么成分

she 主语
managed 谓语动词嘛
what 宾语但是只是先行词
amount to 从句的谓语
a smile of satisfaction 从句宾语
翻译:她努力成功地得到了满意的微笑.what在从句里是主语吗?那这到底是宾语从句还是主语从句?宾语从句 ok?what 充当主语