do sth to the best of one"s ability为什么要加to?

do sth to the best of one"s ability为什么要加to?
do sth to the best of one"s ability为什么要加to?

do sth to the best of one"s ability为什么要加to?
TO 可理解为达到,尽某人全力来完成某事.

do one;s best.的另一种表达式。

表示达到某种程度吧