This document provides exercises on English verb tenses and activities related to computer science concepts. It includes exercises putting sentences into negative and interrogative forms, filling in blanks with simple present verbs, identifying third person verbs, transforming phrases into negative form, writing sentences in affirmative and negative forms, and matching computer science concepts to their definitions. The document covers concepts like memory, mass storage devices, input devices, output devices, and the central processing unit.

1. ENGLISH ACTIVITYVERBAL TENSES
Activity 1: Put these sentences into the negative and interrogative form in the
present:
a) Peterhasa good notebook.
Negative:Peterdoesn’thave agoodnotebook.
Interrogative:DoesPeterhave agoodnotebook?
b) LCD monitorshave the advantage of beingmuchthinnerandlighter.
N: LCD monitorsdoesn’thave the advantage of beingmuchthinnerandlighter.
I: Do LCD monitorshave the advantage of beingmuchthinner andlighter?
c) Some have more advancedcapabilities.
N: Some don’thave advancedcapabilities.
I: Do some have more advancedcapabilities?
Activity 2 : Fill in the blanks with the simple present:
a) Peterreads(read) hismagazine everyday.
b) Sophie does(do) herexerciseatschool.
c) Susan learns (learn) Englishathome.
d) Bernard washes (wash) hiscar.
e) Charles plays(play) guitar.
f) Mary goes(go) to Manaus nextFriday.

2. ACTIVITY 3 : Identifyand circulate the verbs that appear in the simple presentat third
person:
A computerscientist wantstosortthe cards. Firsthe wantsto sort themoutby color.Thenhe
wantsto orderthemby number(2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen,KingandAce).Computer
science usesspecial methodsof doingthings,and hasitsownspecial words.Itislinkedwith
electrical engineering,mathematics,andlanguage science.Computerscience looksatthe
theoretical partsof computers.Computerengineering looksatthe physical partsof computers
(the parts thata personcan touch),andsoftware engineering looks atthe use of computer
programsand howto make them.
ACTIVITY 4 : Transform the followphrasesinto negative form:
a) A computerscientistwantstosortthe cards.
A computerscientistdoesn’twanttosortthe cards.
b) He wantsto order thembynumber.
He doesn’twanttoorder thembynumber.
c) Computerscience usesspecialmethods.
Computerscience doesn’tuse special methods.
d) Computerscience looksatthe theoretical partsof computers.
Computerscience doesn’tlookatthe theoretical partsof computers.
ACTIVITY 5: Write the followsentencesintoaffirmative and negative form, as the example:
a) He / drive /a car. He isdrivinga car. He isnot drivingacar.
b) We / eat / oranges. We are eatingoranges.We are not eatingoranges.
c) You / read/ my magazine. Youare readingmymagazine.Youare not readingmymagazine.
d) We / play / the piano. We are playingthe piano.We are not playingthe piano.

3. ACTIVITY 6 : READ THE TEXT AND ANSWERTHE FOLLOWING QUESTIONS:
The systemunitisthe core of a computersystem.Usuallyit’sarectangularbox placedonor
underneathyourdesk.Insidethisbox are manyelectroniccomponentsthatprocess
information.The mostimportantof these componentsisthe central processingunit(CPU),or
microprocessor,whichactsas the “brain”of yourcomputer.Anothercomponentisrandom
access memory(RAM),whichtemporarilystoresinformationthatthe CPUuseswhile the
computerison. The informationstoredinRAMiserasedwhenthe computeristurnedoff.
Almosteveryotherpartof your computerconnectstothe systemunitusingcables.The cables
plugintospecificports(openings),typicallyonthe backof the systemunit.Hardware thatis
not part of the systemunitissometimescalledaperipheral device ordevice.Yourcomputer
has one or more diskdrives – devicesthatstore informationonametal or plasticdisk.The disk
preservesthe informationevenwhenyourcomputeristurnedoff.
CD and DVD drives.Nearlyall computerstodaycome equippedwithaCDor DVDdrive,usually
locatedonthe frontof the systemunit.CDdrivesuse laserstoread(retrieve)datafroma CD,
and manyCD drivescan alsowrite (record) dataontoCDs. If you have a recordable diskdrive,
youcan store copiesof yourfilesonblankCDs.You can alsouse a CD drive toplaymusicCDs
on yourcomputer.DVDdrivescan do everythingthatCD drivescan,plusreadDVDs.If you
have a DVD drive,youcan watchmoviesonyour computer.ManyDVD drivescanrecord data
ontoblankDVDs.
A mouse isa small device usedtopointtoand selectitemsonyourcomputerscreen.Although
mice come in manyshapes,the typical mouse doeslookabitlike anactual mouse.It’ssmall,
oblong,andconnectedtothe systemunitbya longwire thatresemblesatail.Some newer
mice are wireless.A mouse usuallyhastwobuttons:a primarybutton(usuallythe leftbutton)
and a secondarybutton.Many mice alsohave a wheel betweenthe twobuttons,whichallows
youto scroll smoothlythroughscreensof information.Whenyoumove the mouse withyour
hand,a pointeronyour screenmovesinthe same direction(the pointer’sappearance might
change dependingonwhere it’spositionedonyourscreen).Whenyouwanttoselectanitem,
youpointto the itemand thenclick(pressandrelease) the primarybutton.Pointingand
clickingwithyourmouse isthe mainwayto interactwithyourcomputer.
A keyboardisusedmainlyfortypingtextintoyourcomputer.Like the keyboardona
typewriter,ithaskeysforlettersandnumbers,butitalsohas special keys:a) the function
keys,foundonthe top row,performdifferentfunctionsdependingonwhere theyare used;b)
the numerickeypad,locatedonthe rightside of mostkeyboards,allowsyoutoenternumbers
quickly;c) the navigationkeys,suchasthe arrow keys,allow youtomove yourpositionwithin
a documentor webpage.Youcanalso use yourkeyboardtoperformmanyof the same tasks
youcan performwithamouse.
A monitordisplaysinformationinvisual form, usingtextandgraphics.The portionof the
monitorthat displaysthe informationiscalledthe screen.Like atelevisionscreen,acomputer
screencan showstill ormovingpictures.There are twobasictypesof monitors:CRT (cathode
ray tube) monitorsandLCD (liquidcrystal display) monitors.Bothtypesproduce sharpimages,
but LCD monitorshave the advantage of beingmuchthinnerandlighter.CRTmonitors,
however,are generallymore affordable.

4. A printertransfersdatafroma computerontopaper.Youdon’t needaprinterto use your
computer,buthavingone allowsyoutoprintemail,cards,invitations,announcements,and
othermaterials.Manypeople alsolike beingable toprinttheirownphotosathome.The two
maintypesof printersare inkjetprintersandlaserprinters.Inkjetprintersare the most
popularprintersforthe home.Theycan printinblack andwhite or infull colorandcan
produce high-qualityphotographswhenusedwithspecial paper.Laserprintersare fasterand
generallybetterable tohandle heavyuse.
Speakersare usedtoplay sound.Theymaybe builtintothe systemunitor connectedwith
cables.Speakersallow youtolistentomusicandhearsoundeffectsfromyourcomputer.
ModemTo connectyourcomputerto the internet,youneedamodem.A modemisa device
that sendsandreceivescomputerinformationoveratelephonelineorhigh-speedcable.
Modemsare sometimesbuiltintothe systemunit,buthigher-speedmodemsare usually
separate components.
Mark the correct concept of the following words:
a) Memory
( ) Itis whatyou have to paywhenyoubuy something.
( ) Enablesacomputerto store,at leasttemporarily,dataandprogram.
( ) Whenyouuse the phone to call someone.
b) Mass storage device
( ) Somethingthattell whoapersonis.
( ) Anarea ina businessoffice.
( ) Allowsacomputertopermanentlyretainlarge amountsof data.Commonmassstorage
devicesincludediskdrivesandtape drives.
c) Inputdevice
( ) Usuallykeyboardandmouse,the inputdevice isthe conduitthroughwhichdataand
instructionsenteracomputer.
( ) The departmentthatsellsabusiness’sproducts.
( ) A personfromanothercountry.

5. d) Outputdevice
( ) A displayscreen,printer,orotherdevice thatletsyousee whatthe computerhas
accomplished.
( ) To lookat manythingsand thentake one or two,as the personwishes.
( ) To write yourname.
e) Central ProcessingUnit(CPU)
( ) To saythat you certainlywill orwill notdosomething.
( ) A personwhois notsmart.
( ) The heartof the computer,thisisthe componentthatactuallyexecutesinstructions.