The tracks reached all the principal parts of the city.

In contrast, the series of terms with negative powers is the principal part.

Most verbs are regular enough not to require a knowledge of the principal parts.

One principal part can sometimes be predicted from another, but not with any certainty.

After all, a principal part of his job was to prevent this kind of thing.

"It is, indeed, a feast in which flowers play a principal part."

The principal part of the house was built about 1770.

From the 500 who auditioned this year for the 120-strong company, he won the principal part.

The following table gives the principal parts for the 11-principal-part verbs.

It was that or losing a, er, principal part of himself.