Ii's a great way to learn English[to study] grammar

问题描述:

Ii's a great way to learn English[to study] grammar
上面那句话可不可以把to study 改成by studying?
帮帮忙啦↖(^ω^)↗

必须改,因为by studying grammar 是作方式状语修饰to learn 的
by doing sth 表方式