“我花了很多业余时间和大量的努力自学额外的课程.”英文我这样写对吗?Itookmuchofmysparetimeandmadeagreatefforttostudyextracoursesbymyself.agreateffort好还是alotofeffort好，哪个地道啊？必

Question

“我花了很多业余时间和大量的努力自学额外的课程.” 英文我这样写对吗?
I took much of my spare time and made a great effort to study extra courses by myself.
a great effort好还是a lot of effort好，哪个地道啊？
必须 I 做主语，有上下文的别乱改。

Answer 1

It took me much spare time and a great deal of efforts to study extra courses.
I spent much spare time and a great deal of efforts in studying extra courses.