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UNIT II

If + Past Simple + Future in the Past
I/we/you/they he/she/it introduced /installed/lost I/we/you/they he/she/it would part/conclude /note
               
THE P-N JUNCTION

Language Work

(II) If-clause (If I determined , it would occur )

or

Future in the Past +   if + Past Simple
I/we/you/they he/she/it would part/conclude /note I/we/you/they he/she/it introduced /installed/last
               

For example:

If I doped donor atoms at one end and acceptor atoms at the other end of a silicon crystal, it would have both P-type and N-type regions and there would be a junction between them.

If free electrons and holes moved in a controlled manner, they wouldnt wander freely in the lattice.

 

I wish I determined

wish + Past

For example:

I wish I measured these parameters more carefully.

(=I dont measure them carefully)

I wish I could gain higher results. (I cant)

Remember:

If I were/if I was

I wish it were/I wish it was

For example:

If I were you, I would correct this test. or If I was you,

I wish it were possible.

 

(III) If-clause (If I had designed , they would have set up )

If + Past Perfect + Future Perfect in the Past
I/we/you/they he/she/it had introduced/ had installed/ had lost I/we/you/they he/she/it would have parted/ have concluded/ have noted
               

or

Future Perfect in the Past +     if + Past Perfect
I/we/you/they he/she/it would have parted/ have concluded/ have noted I/we/you/they he/she/it had introduced/ had installed/ had lost
               

For example:

If I had determined a fault, I would have corrected it. (but I didnt determine it)

If one region had lost a positive charge, the other region would have gained it. (but it didnt lose a positive charge)

 

I wish I had designed

wish + Past Perfect

For example:

I wish I had constructed my replica. I would have used it now. (but I didnt construct it)

I wish I had corrected some measurements in my laboratory work. I would have obtained a higher result. (but I didnt correct them)

 

Wish

1. Wish somebody something, but hope somebody do something.

For example:

I wish you an easy test.

I hope you get perfect results in your mathematical test.

2. Wish + Past(We regret something. The meaning is present.)

For example:

I wish you didnt reach critical values. (you reach them)

Mikes going to overcome all difficulties. I wish I was going too.

Wish + Past Perfect(we regret about something in the past)

For example:

I wish I had simulated this object with the help of a new computer. (I didnt simulate)

I wish I hadnt replaced parts in the machine. (I replaced)

3. I wish I could(do something) = I regret that I cannot do it.

For example:

Im sorry I cant help you. I wish I could calculate the resistance in this task. (but I cant)

I wish I could have (done something) = I regret that I could not do it.

For example:

I heard you bought a new computer. I wish I could have gone to look at it. (but I couldnt go)

4. I wish (somebody) would (do something)

(we would like something to happen)

For example:

I wish my computer would outstrip my friends ones.

I wish somebody would help me to measure current in my laboratory work.




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Act as an interpreter. Translate the description of N-type and P-type- semiconductors given by your group mates from English into Russian. | Fill in the table.

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