Rule I:   ~e - e-exclusion

	I.	Abbreviation:	~e
		Description:	e-exclusion for verbs ending on "e"
		Example verb:	2.	to arrive
		Application:	-	the verb ends on "e"
			-	instead of "ed" only "d" is appended in the Indicative Past and Past Participle
			-	in Present Participle (Gerund) the "e" before "ing" is omitted (Exception: in case of the double vocals "ae", "ee" and "oe", the "e" remains).

		Validity:	Present:	-
			Past:	all forms
			Imperative:	-
			Present Participle:	always
			Past Participle:	always
		Examples:	Past:	"he arrived", not "he arriveed"
			Past Participle:	"arriving", not "arriveing"
			Double vocal 1:	"rescue" becomes "rescuing", not "rescueing"
			Double vocal 2:	"free" becomes "freeing", not "freing"

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also see:

Verb-irregularities - overview