charity despite regularly donate…to… to one's surprise 一般现在时 现在完成时 表示让步 participate in

event regularly together sit down 动名词作主语 一般现在时 语法一致

exercise must not regularly that vitamin you lead to 名词作主语 名词作宾语 动名词作主语 一般现在时 that,if, whether引导的宾语从句 情态动词(not)+动词原形 bear in mind

regularly one of… 不定式作定语 动名词作主语 一般现在时 语法一致

indoors regularly be likely to do sth. take exercise 介词与其它词类的搭配 关系代词who引导限制性定语从句

despite regularly schedule volunteer work as 一般现在时 主语从句的连接词 that, whether, as, as if, as though, because引导的表语从句 be capable of