第1个回答 2012-01-11
此句有两处错误。第一处是比较明显的return back to,有两种改法，可以将return改成come，也可将back to 去掉;第二处是Thanks to your help。固定句式：thanks for sth./sb's doing sth.
希望对你有帮助^-^
第2个回答 2012-01-11
back 多余了 去掉，return（返回，回来）和back （回）意思上重复了
或者保留back：I have come back to my motherland.本回答被提问者采纳
第3个回答 2012-01-11
I have come back to my motherland.Thanks for your help.
第4个回答 2012-01-11
I have come back to my motherland.Thanks for your help.