Old English Verb Inflection replacement

A Sample Strong Verb: Write out your answers to the following questions and bring them to section. The following are the four principal parts of the the verb "to help":

 

helpan, healp, hulpon, holpen


1. What are the two uses of the second of the four principal parts, healp?

2. Write out the two preterite subjunctive forms.

3. Is the first part, helpan, used for any preterite forms?

4. Can the fourth part, holpen, be used for anything other than the past participle?