english language 2
DESCRIPTION
Lessons 3 - 4. English language 2. 3 - Types of Computer Systems. From mainframes to wearable computers Mainframe server desktop PC IBM PC Apple Macintosh laptop (notebook)PC Thin Film Transistor (TFT) screen touchpad Universal Serial Bus (USB) ports battery packs. - PowerPoint PPT PresentationTRANSCRIPT
3 - Types of Computer Systems
A. From mainframes to wearable computers Mainframe
server
desktop PC IBM PC Apple Macintosh
laptop (notebook)PC Thin Film Transistor (TFT) screen touchpad Universal Serial Bus (USB) ports battery packs
3 - Types of Computer Systems
A. From mainframes to wearable computers tablet PC PDA - Personal Digital assistant
handheld devices palmtops pocket PCs
Input via stylus touch screen handwriting recognition voice recognition wireless technology
wearable computer
4 - Input devices: type, click and talk!
A. Interacting with your computer Input devices - definition
touchpadtouchpad
trackballtrackball
4 - Input devices: type, click and talk!
B. The keyboard Groups of keys
Alphanumeric keys Letters and numbers
Numeric keypad Numeric and editing keys
Function keys Cursor keys
Arrow keys, Home, End, Page Up, Page Down Dedicated keys
Ctrl Caps lock Enter (Return) Backspace
Modal Verbs Modal verbs are a special form of verbs that we use
before other verbs to express certain meanings: permission ability possibility certainity
Modal verbs are: can, could, may, might, shall, should, will, would, must, ought to
Verbs similar to modals are: used to, had better, need not (needn’t)
Past and future of modals: be able to, have to
Modal Verbs must In affirmative sentences we use must when we mean: “This is necessary.”I must go to the library tomorrow.
We must fill in this form.
“This is a very good idea.”
You must visit us while you are in Paris.
We must see you again.
In questions, we use must when we mean: “Is this really necessary?”Must you talk so loud?
Must we tell the police when we change the address?
Modal Verbs must not (mustn’t) and need not (needn’t) We use must not when we mean:
“Do not do that!”
You must not smoke here!
You must not wake the baby.
We use need not when we mean:
“This is not necessary.”
We need not pay now, we can pay later.
We need not hurry - we are early!
Affirmative “need” is not a modal verb.He needs to go now.
Modal Verbs have to It is not a modal verb, but we use have to like must
and do not have to like need not. We use have to when we want to say/ask: “This is
necessary.”/”Is this necessary?” (like must)
You have to drive on the left in Britain.
Does she have to study for her exam?
We use do not/does not have to when we want to say “This is not necessary.” (like need not)
You do not have to phone her, she knows already.
We normally use have to, not must when we talk about rules and laws.
Modal Verbs had to | will have to We use had to for the past and will have to for the
future of must and have to.
Did you have to learn Franch in school?
I had to answer all the questions.
I did not have to make lunch yesterday.
I will have to clean my flat tomorrow.
Will you have to start school next month?
He will not have to pass the exam.