private static Verb ComputeNewVerb(string word)
{
string pastTense = null;
string pastPart = null;
string presPart = EnglishUtils.GetPresentParticiple(word);
string thirdPers = GetThirdPerson(word);
foreach (KeyValuePair <string, string[]> irregular in _irregularVerbs)
{
if (StringUtils.PartOf(word, irregular.Key, '-'))
{
string[] pasts = irregular.Value;
if (pasts[1].Length > 0)
{
string prefix = word.Substring(0, word.LastIndexOf(irregular.Key, StringComparison.Ordinal));
pastTense = prefix + pasts[0];
pastPart = prefix + pasts[1];
break;
}
}
}
if (pastTense == null)
{
pastTense = EnglishUtils.GetRegularPast(word);
pastPart = EnglishUtils.GetRegularPast(word);
}
return(new Verb(word, pastTense, pastPart, presPart, thirdPers));
}
public void GetVerbForms()
{
//long vowel or diphthong followed by a consonant or ending in a consonant cluster
foreach (string root in new[] { "paint", "claim", "devour", "play", "delight", "clamp", "lacquer" })
{
Assert.AreEqual(root + "ed", EnglishUtils.GetRegularPast(root));
Assert.AreEqual(root + "ing", EnglishUtils.GetPresentParticiple(root));
Assert.AreEqual(root + "s", EnglishUtils.GetThirdPerson(root));
}
//short vowel
foreach (string root in new[] { "chat", "chop", "compel", "quiz", "squat", "quit", "equal", "whiz" })
{
char lastChar = root[root.Length - 1];
Assert.AreEqual(root + lastChar + "ed", EnglishUtils.GetRegularPast(root));
Assert.AreEqual(root + lastChar + "ing", EnglishUtils.GetPresentParticiple(root));
if (!root.Equals("quiz") && !root.Equals("whiz")) //irregular third person
{
Assert.AreEqual(root + "s", EnglishUtils.GetThirdPerson(root));
}
}
//consonant followed by e
foreach (string root in new[] { "dance", "save", "devote", "evolve", "quote" })
{
Assert.AreEqual(root + "d", EnglishUtils.GetRegularPast(root));
Assert.AreEqual(root.Substring(0, root.Length - 1) + "ing", EnglishUtils.GetPresentParticiple(root));
Assert.AreEqual(root + "s", EnglishUtils.GetThirdPerson(root));
}
//sibilants
foreach (string root in new[] { "kiss", "bless", "box", "polish", "preach", "bias", "box" })
{
Assert.AreEqual(root + "ed", EnglishUtils.GetRegularPast(root));
Assert.AreEqual(root + "ing", EnglishUtils.GetPresentParticiple(root));
Assert.AreEqual(root + "es", EnglishUtils.GetThirdPerson(root));
}
//consonant followed by y
foreach (string root in new[] { "comply", "copy", "magnify" })
{
Assert.AreEqual(root.Substring(0, root.Length - 1) + "ied", EnglishUtils.GetRegularPast(root));
Assert.AreEqual(root + "ing", EnglishUtils.GetPresentParticiple(root));
Assert.AreEqual(root.Substring(0, root.Length - 1) + "ies", EnglishUtils.GetThirdPerson(root));
}
}
