Future forms

Future continuous (will be + ‘ing’ form)

We use the future continuous to talk about something that will be in progress at or around a time in the future.

• This time tomorrow we’ll be sitting on the beach. I am so excited!
• Tomorrow at eight we will be flying home.
  
  The following sentences are not about the future but we can use the future continuous to talk about what we assume is happening at the moment:


• Don’t phone her now, she’ll be having dinner.
• The kids are very quiet. They’ll be doing something wrong, I know it!

Future Perfect (will have + past participle)

We use the future perfect to say that something will be finished by a particular time in the future.

• Do you think you will have finished it by next Thursday?
• In 5 years time I’ll have finished university and I’ll be able to earn some money at last.

We often use the future perfect with ‘by’ or ‘in’

• I think astronauts will have landed on Mars by the year 2020.
• I’ll have finished in an hour and then you can use the computer.

‘By’ means ‘not later than a particular time’ and ‘in’ means 'within a period of time’. We don’t know exactly when something will finish.

• I promise I’ll have done all the work by next Saturday.

We don’t know exactly when he will finish the work – maybe Thursday, maybe Friday – but definitely before Saturday.

Future Perfect Continuous (will have been + past participle) 

We use it to express the duration of a future situations and also to express certainty about the cause of some future situation. 

 

We use this tense to express situations that will last for a specified period of time at a definite moment in the future. It is important that we expect these situations to last longer.

• Before they come, we will have been cleaning the house for 5 hours.
• By the next year, Ben and his wife will have been living together for 50 years. 

English speakers also use this tense when they want to express certainty about the cause of some future situation.

• By this time, he will have been working for 12 hours, so he will be very tired.
• We will be making a rest stop in half an hour, because you will have been driving the car for 6 hours by then. 

Learn more at:
 http://www.englishtenses.com/future_tenses

 

Most common prefixes in English

Many of today's English words contain prefixes from Greek or Latin. Understanding the meanings of the most common prefixes can help us deduce the meanings of new words that we run across in our reading.

Still, we do need to be careful: the same prefix may be spelled in more than one way (pre- and pro-, for instance), and some prefixes (such as in-) have more than one meaning (in this case, "not" and "into"). Even so, being able to recognize prefixes can help us build our vocabularies.

Prefix	Meaning	Examples
a-, an-	without, lack of, not	amoral, acellular, abyss, achromatic, anhydrous
ante-	before, earlier, in front of	antecedent, antedate, antemeridian, anterior
anti-	against, opposite of	anticlimax. antiaircraft, antiseptic, antibody
auto-	self, same	autopilot, autobiography, automobile, autofocus
circum-	around, about	circumvent, circumnavigate, circumscribe
co-	with, together	copilot, coworker, coexist, coauthor
com-, con-	together, with	companion, commingle, contact, concentrate
contra-, contro-	against, opposite	contradict, contrast, contrary, controversy
de-	down, off, away from	devalue, deactivate, debug, degrade, deduce
dis-	not, apart, away	disappear, disagreeable, disbar, dissect
en-	put into, cover with	enclose, entangle, enslave, encase
ex-	out of, from, former	extract, exhale, excavate, ex-president
extra-	beyond, outside, more than	extracurricular, extramarital, extravagant
hetero-	different, other	heterosexual, heterodox, heterogeneous
homo-, homeo-	same, alike	homonym, homophone, homeostasis, homosexual
hyper-	over, more, beyond	hyperactive, hypersensitive, hypercritical
il-, im-, in-, ir-	not, without	illegal, immoral, inconsiderate, irresponsible
in-	in, into	insert, inspection, infiltrate
inter-	between, among	intersect, interstellar, intervene, interpenetrate
intra-, intro-	within, inside	intravenous, intragalactic, introvert
macro-	large, prominent	macroeconomics, macrostructure, macrocosm
micro-	very small	microscope, microcosm, microbe
mono-	one, single, alone	monocle, monologue, monogamy, monotony
non-	not, without	nonentity, nonaggressive, nonessential,nonfiction
omni-	all, every	omniscient, omnivorous, omniscient, omnidirectional
post-	after, behind	postmortem, posterior, postscript, postoperative
pre-, pro-	before, forward	precede, predict, project, prologue
sub-	under, lower	submarine, subsidiary, substandard
sym-, syn-	same time, together	symmetry, symposium, synchronize, synapse
trans-	across, beyond, through	transmit, transaction, translation, transfer
tri-	three, every third	tricycle, trimester, triangle, triathlon
un-	not, lacking, opposite of	unfinished, unskilled, ungraceful, unfriendly
uni-	one, single	unicorn, unicellular, unicycle, unilateral
		https://www.thoughtco.com/common-prefixes-in-english-1692724