I have a sentence here and have been wondering if I could put the word "to" in the spot indicated.
I have written three sentences in various arrangements and wish you can tell me which one is right.
1. They help students more easily recognize and correct their own errors.
2. They help students to more easily recognize and correct their own errors.
3. They help students to more easily recognize and to correct their own errors.
Also, can I do away with the what-looks-to-be redundant word "have" in bold and underlined letters?
Thank you.