/**
* Creates a stack of verbs for the verb phrase. Additional auxiliary verbs
* are added as required based on the features of the verb phrase.
*
* @param parent
* the parent <code>SyntaxProcessor</code> that will do the
* realisation of the complementiser.
* @param phrase
* the <code>PhraseElement</code> representing this noun phrase.
* @return the verb group as a <code>Stack</code> of <code>NLGElement</code>
* s.
*/
public static Stack <INLGElement> createVerbGroup(
SyntaxProcessor parent, PhraseElement phrase)
{
string actualModal = null;
var formValue = phrase.getFeature(Feature.FORM.ToString());
Tense tenseValue = phrase.getFeatureTense(Feature.TENSE.ToString());
var modal = phrase.getFeatureAsString(Feature.MODAL.ToString());
var modalPast = false;
var vgComponents = new Stack <INLGElement>();
var interrogative = phrase.hasFeature(Feature.INTERROGATIVE_TYPE.ToString());
if (Form.GERUND.Equals(formValue) || Form.INFINITIVE.Equals(formValue))
{
tenseValue = Tense.PRESENT;
}
if (Form.INFINITIVE.Equals(formValue))
{
actualModal = "to";
}
else if (formValue == null || Form.NORMAL.Equals(formValue))
{
if (Tense.FUTURE.Equals(tenseValue) &&
modal == null &&
((!(phrase.getHead() is CoordinatedPhraseElement)) || (phrase
.getHead() is CoordinatedPhraseElement &&
interrogative)))
{
actualModal = "will";
}
else if (modal != null)
{
actualModal = modal;
if (Tense.PAST.Equals(tenseValue))
{
modalPast = true;
}
}
}
pushParticles(phrase, parent, vgComponents);
var frontVG = grabHeadVerb(phrase, tenseValue, modal != null);
checkImperativeInfinitive(formValue, frontVG);
if (phrase.getFeatureAsBoolean(Feature.PASSIVE.ToString()))
{
frontVG = addBe(frontVG, vgComponents, Form.PAST_PARTICIPLE);
}
if (phrase.getFeatureAsBoolean(Feature.PROGRESSIVE.ToString()))
{
frontVG = addBe(frontVG, vgComponents, Form.PRESENT_PARTICIPLE);
}
if (phrase.getFeatureAsBoolean(Feature.PERFECT.ToString()) ||
modalPast)
{
frontVG = addHave(frontVG, vgComponents, modal, tenseValue);
}
frontVG = pushIfModal(actualModal != null, phrase, frontVG,
vgComponents);
frontVG = createNot(phrase, vgComponents, frontVG, modal != null);
if (frontVG != null)
{
pushFrontVerb(phrase, vgComponents, frontVG, formValue,
interrogative);
}
pushModal(actualModal, phrase, vgComponents);
return(vgComponents);
}