interrogative sentences, and for justifying the agreement of verbs.

In connection with Lesson 19 attention may be called to the agreement of
verbs with _I_ and _you_. Exercises may be given from which the pupils will
draw the following conclusions:--

_I_ can be used with _am, was, have_, and _do_. _You_ may mean one or more
than one, but the verb always agrees as if _you_ meant more than one.

Exercises may be given requiring the pupils to use such expressions as "You
_were_," "They _were_," "We _were_," "He _doesn't_," etc., and to repeat
them aloud till the ear is accustomed to the right form.

When predicate verbs immediately follow their subjects, there is little
danger of errors in agreement, except that _was_ is often used incorrectly
for _were_, and _don't_ for _doesn't_. The chief object of introducing
these exercises here is to train the pupils' observation so that they will
readily and naturally note the agreement of the subject and predicate when
these terms are transposed, or are separated by other words. To determine
the correct form of the verb in such cases, let the pupils see how it
sounds when placed immediately after its subject. We suggest exercises like
the following:--

1 is are
2 was were
3 has have
4 does do
5 comes come
6 goes go
7 thinks think