propose
1.propose（意欲）后面接不定式或动名词都可以。例如：I propose to write（或writing）a complete grammar.用不定式比用动名词普通。
2.propose（提议）后面接不定式或动名词都可以。例如：We propose to abolish（或abolishing）all weapons of mass destruction.也可以接以that引导的从句，那从句里用should或虚拟现在式。例如：I propose that a series of discussions (should) be started at once.和I proposed that a series of discussions (should) be started at once.第一句里的should改作shall也可以。
3.propose to或propose marriage to是“向…求婚”，不是“追求…”，如可以说He proposed (marriage) to her yesterday，不可说He has been proposing (marriage) to her for years。
