Brazilian Portuguese Grammar

Primitive tense	Derived tense	How do you do the derivation?	Endings to be added
Primitive tense	Derived tense	How do you do the derivation?	1st	2nd	3rd
Impersonal infinitive	Imperfect indicative	*Remove the infinitive endings (-ar, -er, -ir)* and add the imperfect indicative endings.**	ava	ia	ia
			avas	ias	ias
			ava	ia	ia
			ávamos	íamos	íamos
			áveis	íeis	íeis
			avam	iam	iam
	Future indicative	Add future indicative endings to the impersonal infinitive.	ei	ei	ei
			ás	ás	ás
			á	á	á
			emos	emos	emos
			eis	eis	eis
			ão	ão	ão
	Preterite future indicative	Just add the preterite future indicative endings to impersonal infinitive.	ia	ia	ia
			ias	ias	ias
			ia	ia	ia
			íamos	íamos	íamos
			íeis	íeis	íeis
			iam	iam	iam
	Gerund	*Remove ar, er,* and ir from the infinitive and add ando, endo and indo.**	ando	endo	indo
	Participle	Remove ar, er and ir from the infinitive and add ado, ido and ido.	ado	ido	ido
	Personal infinitive	Just add the personal infinitive endings to the forms of the impersonal infinitive.	-	-	-
			es	es	es
			-	-	-
			mos	mos	mos
			des	des	des
			em	em	em