|1. They add -s to form the 3rd person present singular.|
|2. The past participle and simple past tense are formed by adding -ed.|
|3. The present participle is formed by adding -ing.|
There are well over 300 verbs which do not obey one or more of these procedures. Space precludes listing them all; besides, I think that would be tedious rather than helpful-both to read and to write. What is worthwhile is to look at the various kinds of irregular verb, with examples of each.
A. A number of verbs seem to be entirely regular, but they incorporate a change of spelling in one or more of their forms. For example:
(a) stop takes a double p in both participle forms and in the simple past:
(b) So does hop:
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Publication information: Book title: Write in Style: A Guide to Good English. Contributors: Richard Palmer - Author. Publisher: Spon Press. Place of publication: London. Publication year: 1993. Page number: 274.
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