可以,只要有動詞、介詞等,后面就可以跟名詞,如果跟句子,就是賓語從句了.
如：talk about what happened yeaterday.：談論昨天發(fā)生的事故.about 后就是賓語從句.
to do what you should do.做你該做的事情.what you should do就是 to do 后的賓語從句.
study what you should study ：學你該學的知識.what you should study 就是及物動詞study 后的賓語從句.
To find who did this is important 中To find who did this 是主語,is important 是謂語和表語.who did this只是find的賓語而已,不是全句的賓語.