Considered individually the plural is peas; when referring to the crop the proper form is pease.
Penny
“He gave me twelve bright new pennies,” referring to the individual coins. “I paid him twelve pence,” meaning a shilling.
Wharf
Plural, generally wharves in America; wharfs in England.
CHAPTER VII
Adverbs
The clearness of the sentence is often dependent upon the proper placing of the adverb. No absolute rule can be laid down, but it should generally be placed before the word it qualifies. It is sometimes necessary to place it after the verb, and occasionally between the auxiliary and the verb, but it should never come between to and the infinitive.
“I have thought of marrying often.” As the adverb relates to the thinking, and not to the marrying, the sentence should read, “I have often thought of marrying.”
“We have often occasion to speak of health.” This should be, “We often have occasion,” etc,
“It remains then undecided whether we shall go to Newport or Saratoga.” Place undecided before then.