Periods are also used in abbreviations. A two or three-word verbal combining a main verb with a second word for a unique meaning. Laid up, which means injured or ill. A letter or group of letters added to the beginning of a root word to modify its meaning. A word beginning phrases that clarify relationships between other parts of a sentence.
Phrases begin with the auxiliary verb is, am, or are .
Present progressive phrases end with a main verb ending in -ing . The verb phrase begins with has or had and concludes with a past participle. A word replacing a noun or another pronoun. A pronoun performing and receiving an action simultaneously. The word beginning a relative clause.