Complete English Grammar Rules_ Examples, Exceptions, Exercises, and Everything You Need to Master Proper Grammar ( PDFDrive )-156

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•	“I	will	have	finished	by	that	time.”
•	“She	will	have	sung	with	a	professional	orchestra	before	the	tour	begins.”
(Notice	that	have	does	not	conjugate	for	the	third-person	singular	in	this	tense.)
Present	Perfect	Continuous	Tense
The	present	perfect	continuous	tense	is	structured	as	have	been	+	the	present
participle	of	the	main	verb:
•	“I	have	been	trying	to	reach	you	for	over	an	hour.”
Past	Perfect	Continuous	Tense
The	past	perfect	continuous	tense	is	structured	as	had	been	+	the	present
participle	of	the	main	verb:
•	“We	had	been	working	through	the	night.”
Future	Perfect	Continuous	Tense
The	future	perfect	continuous	tense	is	structured	as	will	have	been	+	the	present
participle	of	the	main	verb:
•	“I	will	have	been	working	here	for	10	years	next	week.”
(Notice	that	have	does	not	conjugate	for	the	third-person	singular	in	this	tense.)
You	may	have	noticed	that	the	future	tenses	also	use	the	auxiliary	verb	will.	This
is	one	of	the	modal	auxiliary	verbs,	which	will	be	covered	in	a	separate	section.
Forming	negative	sentences	with	not
The	most	common	way	to	make	a	verb	negative	is	to	use	the	adverb	not.
However,	main	verbs	cannot	take	not	on	their	own—they	require	an	auxiliary
verb	to	do	this.
Using	do
If	a	verb	does	not	already	use	an	auxiliary	verb	(i.e.,	to	form	one	of	the	tenses
above),	we	use	the	auxiliary	verb	do/does	to	accomplish	this.
For	example:
•	“I	work	on	the	weekends.”	(affirmative	sentence)