_command_ or _entreaty_; or the sense of the verb may be expressed
_without affirming_ or _commanding_. The verb also expresses that an
action or state _is_ or _was_ going on, by a form which is also used
sometimes as a noun, and sometimes to qualify nouns.

_Affirmations_ are _modified_ by _adverbs_, some of which can be
inflected to express different degrees of modification.

Words are joined together by _conjunctions_; and the various _relations_
which one thing bears to another are expressed by _'prepositions. Sudden
emotions_ of the mind, and _exclamations_ are expressed by _interjections_.

Some words according to meaning belong sometimes to one part of speech,
sometimes to another. Thus, in "After a storm comes a _calm_," _calm_ is
a noun; in "It is a _calm_ evening," _calm_ is an adjective; and in
"_Calm_ your fears," _calm_ is a verb.

The following sentence containing all the parts of speech is parsed
etymologically:

_"I now see the old man coming, but, alas, he has walked with much
difficulty."_

_I_, a personal pronoun, first person singular, masculine or feminine
gender, nominative case, subject of the verb _see_.

_now_, an adverb of time modifying the verb _see_.

_see_, an irregular, transitive verb, indicative mood, present tense,
first person singular to agree with its nominative or subject I.