excited so...that 一般现在时 结果状语从句

cooking use 一般现在时的被动语态 by comparison

admit 含情态动词的被动语态

impression others 一般过去时

developing prove technology 现在完成时

although effort opinion 让步状语从句 joint be divided into

claim crocodile expert oppose pose species 动名词作主语 一般现在时 一般将来时 现在完成时的被动语态 固定句型

accident crossroads occur be likely to do sth. 一般现在时 原因状语从句

alone evidence prove it 作形式主语 一般过去时

in fact more than 关系代词that引导限制性定语从句