Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
ПОСОБИЕ -1.doc
Скачиваний:
6
Добавлен:
10.11.2019
Размер:
2.38 Mб
Скачать

UNIT I

Diodes

Language Work

Present Simple

Affirmative

I/we/you/they

amplify/define/direct

he/she/it

amplifies/defines/directs

For example:

  • Diodes permit current to flow in only one direction.

  • The dictionary defines electronics as the study of conduction of electricity.

Spelling

-es after -s / -sh / -ch: pass – passes, finish – finishes, watch – watches

-y -ies: study – studies, rectify – rectifies

also: do – does, go – goes

Reading

[s]

directs

–s(es)

[z]

defines, amplifies

[iz]

passes

Remember:

I/we/you/they have

he/she/it has

For example:

  • Diodes have 2 basic elements.

  • Every diode has a cathode and a plate.

Negative (with the auxiliary verb)

I/we/you/they

he/she/it

don't

doesn't

amplify/define/direct

For example:

  • Diodes don’t permit current to flow in opposite directions.

  • Positive voltage on the plate doesn’t repel electrons.

Negative (with no auxiliary verb)

I/we/you/they/

he/she/it

can/ may/must

not

amplify/define/ direct

I/we/you/they/

he/she/it

am/is/are

not

a physicist(s)

I/we/you/they/

he/she/it

have/has

no/hasn’t or don’t/doesn’t have

a heater

For example:

  • These devices can’t be amplifiers.

  • They are not physicists.

  • This gadget doesn’t have a/has no heater.

Remember: There is no grid in a diode. But: There isn’t a grid in a diode.

A diode has no grid. A diode hasn’t a grid.

Questions (with the auxiliary verb)

Do

Does

I/we/you/they

he/she/it

amplify/define /direct?

For example:

  • Do diodes permit current to flow in only one direction?

  • Does the dictionary define electronics as the study of conduction of electricity?

Questions (with no auxiliary verb)

Can/may/must

I/we/you/they/ he/she/it

amplify/define/direct?

Am/is/are

I/we/you/they /he/she/it

(a) physicist(s)/direct current?

Have/has

I/we/you/they/ he/she/it

a heater?

For example:

  • Can these devices be amplifiers?

  • Are they physicists?

  • Has this gadget a heater? or Does this gadget have a heater?

Remember:

1. I am a physicist, aren’t I?

2. In the following examples, do is also the main verb (do you do /doesn't do etc.): What do you do? I work in a shop.

He's always so lazy. He doesn't do anything to help.

The verb to be

I аm (I'm)

I

am not

(I'm not)

he

is

(he's)

he

is

not

(he's not or he isn't)

she

(she's)

she

(she's not or she isn't)

it

(it's)

it

(it's not or it isn't)

we

are

(we're)

we

are not

(we're not or we aren't)

you

(you're)

you

(you're not or you aren't)

they

(they're)

they

(they're not or they aren't)

For example:

  • I am/am not a physicist.

  • He is/is not a famous scientist.

  • Rectifier isn’t an electrical device.

  • It isn’t easy to explain the operation of semiconductor devices.

  1. Fill in the table.

Noun

Verb

Adjective

Adverb

Translation

Transcription

alternating

amplification

amplifying

усиление

[‚xmplIfI′keIS(q)n]

anode

[xnqVd]

apply

attract

cathode

[kx′TLd]

compare (to, with)

circuit

схема

[′sE:kIt]

charge

conduction

conductivity

conductor

semiconductor

[kqn′dAkSn] (n)

[kqn′dAkt] (v)

current AC (a.c.= alternating current)

DC (d.c. = direct

current)

development

разработка

device

[di′vais]

diode

directly

[dI′rektlI]

electrode

electron

emit

flow

heat

heat

operator, operation

patent (n,v)

[′pxtqnt]

phenomenon

(pl.- phenomena)

явление

repel

rectifier

[′rektIfaIq]

source

[′sLs]

switch (on/off)

tube

unit

блок, элемент

vacuum