attempt
1.an attempt to do it和an attempt at doing it都可以说，用不定式普通些。
2.attempt通常指可数的一次一次的尝试或努力，make an attempt里的an决不可省去。但make little attempt（几乎不尝试），make small attempt（几乎不尝试），和without attempt（不尝试）等表达方式都可用。
3.attempt用作动词，后面接不定式或动名词都可以。如They will attempt to do it和They will attempt doing it。用不定式普通些。
4.attempt很容易犯双重否定的毛病，如不可说The work was attempted to be done quickly，该改作An attempt was made to do the work quickly。
