My wish was to be a great sentist,be动词后又动词为什么用不定式

问题描述:

My wish was to be a great sentist,be动词后又动词为什么用不定式

My wish was (to be 要成为) a great sentist.
我(原来)的理想是要成为一名科学家.
这是过去将来时.