请问语法结构 by doing A and do B 还是 by doing A and doing 这里是并列结构对么?`

请问语法结构 by doing A and do B 还是 by doing A and doing 这里是并列结构对么?`
请问语法结构 by doing A and do B 还是 by doing A and doing 这里是并列结构对么?`

请问语法结构 by doing A and do B 还是 by doing A and doing 这里是并列结构对么?`
是 by doing A and doing B
He practises English by speaking and reading every day.

by doing A and doing B 并列

应是by doing A and doing B
没有by doing A and do B
实际上是省略了by by doing A and (by) doing B
是并列结构。
祝开心每一天！采纳为盼！