remember/forget/regret +to do(不定式表示未发生)
remember/forget/regret +doing(动名词表示发生过)
want/need/require doing(动名词主动形式表示被动含义)=want/need/require to be done
want/need/require to do 想要/需要/要求做……
try to do=mean to do想要做
try doing尝试做(看结果)
mean doing意味着……
stop/go on doing 停止/继续做……(doing是宾语)
stop/go on to do停下来/接着做(另一件事:to do是目的状语=in order to do)