请问句中的动词可以代替括号中的动词吗?①he speak (say)that he will bear necessary cost②i think he know(can understand)the English word that i say

问题描述:

请问句中的动词可以代替括号中的动词吗?
①he speak (say)that he will bear necessary cost
②i think he know(can understand)the English word that i say