Question

Verbs that can be changed to the past tense by adding -d or -ed are:

A.irregular verbs
B.infinitives
C.past participles
D.regular verbs

Answer 1

whoever helps me i will give them a metal

Answer 2

I'm not really good at english overall
but I'll try to help :)

these are some definitions I found that should be able to answer your question :)
http://www.english-language-grammar-guide.com/types-of-verbs.html
infinitives - http://www.english-language-grammar-guide.com/infinitives.html
past participles - http://www.english-language-grammar-guide.com/past-participle.html

Answer 3

http://leidybanezaroa.files.wordpress.com/2012/11/lista-verbos-irregulares22.jpg

It wouldn't not be A.

I think it might be D...

http://leidybanezaroa.files.wordpress.com/2012/11/lista-verbos-irregulares22.jpg

@sleepyhead314 I took your question sorry. :P

Answer 4

I practically gave the answer with the last link I gave
if only if they would click on it...