It then became possbile for universities to use the system as well划分句子成分

It then became possbile for universities to use the system as well划分句子成分

在那个时候,大专院校也能够使用该系统了.
1 It (形式主语)then （时间状语）became （谓语）possbile （表语）for universities （逻辑主语）to use the system （真正主语）as well（语气词）
2 for universities to use the system （真正主语）,it (形式主语)