Describing functions
We can describe the function or use of a device in different ways:
for + gerund:
… is/are used in…
.. is/are used + to + infinitive
relative pronoun + is/are used + to + infinitive
relative pronoun + verb
you can use …+ to + infinitive
using … you can + verb
work by + gerund:
This is a device for controlling the cursor and selecting items on the screen.
A microphone is used for inputting sound
Joysticks are used in computer games.
It's used to control...
This is a device which/that is used to control…
This is a device which controls...
You can use a scanner to input text.
Using a scanner, you can input printed drawings directly into a computer
It works by detecting light from the computer screen
Describing features
We can describe features like this:
An optical mouse has an optical sensor instead of a ball underneath.
It usually features two buttons and a wheel.
You can connect it to a USB port.
A wireless mouse works / operates without cables.
It allows the user to answer multiple-choice questions and…
Speaking 1
Match each device (1-7) with its use (a-g) and describe their functions using expressions given above:
Example: You can use a mouse to select from a menu.
Device |
Use |
1 joystick |
a draw pictures onto a computer screen |
2 lightpen |
b copy documents |
3 scanner |
с input sound |
4 digital camera |
d input text |
5 mouse |
e select from a menu |
6 keyboard |
f move the cursor rapidly |
7 microphone |
g produce photos without film |
Writing.
Write a description of the Sony PlayStation 3 controller, using “function and feature” structures and the notes below.
Functions
control video games
hold it with both hands, use thumbs to handle directional sticks and face buttons
Features
six-axis sensing system (capable of sensing motion in six directions: up, down, left, right, forwards and backwards)
wireless controller (Bluetooth)
USB mini port and cable for wired play and automatic battery charging
Listening 3:
Task 1. Listen to a computer technician describing three input devices. Write which devices he's talking about.
1_________________ 2_________________ 3_________________
Task 2. Listen again and complete these extracts.
This device is _____________ enter information into the computer.
... it may also ___________ function keys and editing keys __________ special purposes.
This is a device _________ the cursor and selecting items on the screen.
It usually ______________ two buttons and a wheel.
... the user ______________ activate icons or select items and text.
It _____________ detecting light from the computer screen and is used by pointing it directly at the screen display.
It _______________ the user ______________ answer multiple-choice questions and…
Speaking 2. Choose one of these input devices and describe its functions and features. Try to guess which device your partner is describing.
