help opportunity service volunteer 动名词作主语 一般现在时 participate in

eventually need opportunity reverse seize situation that we as long as 名词作宾语 主格 一般现在时 一般将来时 that,if, whether引导的宾语从句 条件状语从句 bear in mind

aware because need opportunity seize seminar complain about 介词与其它词类的搭配 一般过去时 原因状语从句 关系代词that引导限制性定语从句 关系代词which引导限制性定语从句

concept marketing opportunity promote 不定式作目的状语 介词与其它词类的搭配 一般过去时 现在完成时 make use of

challenge crisis finally glory opportunity a number of in the face of 介词与其它词类的搭配 一般过去时 不定式的一般式：to+动词原形

achieve challenge opportunity overcome(overcame overcome) seize though work(奏效；起作用) be sure to do sth. 现在完成时 让步状语从句 语法一致

encounter opportunity 不定式作宾语补足语 关系代词which引导限制性定语从句 情态动词(not)+动词原形

opportunity relish 不定式作定语 形容词作定语 一般现在时 语法一致

development opportunity 现在完成时

cost(cost cost) health opportunity 动名词作主语 现在完成时