It uses the present indicative form of esse.

Note that the indicative form was can be used equally well in sentences of this type, but were is sometimes preferred especially in more formal English.

Imperatives are formed by adding the particle -ni to the future indicative form of the verb.

When the indicative form is used, it is accompanied by the inseparable pronoun.

Negative answers, however, always use the indicative form of the verb.

However, even when the subjunctive and indicative forms are identical, their time references are usually different.

In Spanish, a present subjunctive form is always different from the corresponding present indicative form.

"Dost" or "doest" would be the present indicative form to go with thou.

For each of these, there are subjunctive and indicative forms.

The negative form of the verb, (to not be), is formed by attaching ni to the present indicative forms.