|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|
(II) If-clause (If I determined ..., it would occur ... )
|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|
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 wouldn't wander freely in the lattice.
I wish I determined...
wish + Past
I wish I knew these parameters.
(=I don't know them)
I wish I could gain higher results. (I can't)
If I were/if I was
I wish it were/I wish it was
If I were you, I would correct this test. / If I was you, ...
I wish it were / was 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|
|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|
If I had determined a fault, I would have corrected it. (but I didn't determine it)
If one region had lost a positive charge, the other region would have gained it. (but it didn't lose a positive charge)
I wish I had designed...
wish + Past Perfect
I wish I had constructed my replica. I would have used it yesterday. (but I didn't construct it)
I wish I had corrected some measurements in my laboratory work. I would have obtained a higher result. (but I didn't correct them)
1. Wish somebody something, but hope somebody do something.
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.)
I wish you didn't reach critical values. (you reach them)
Mike's going to overcome all difficulties. I wish I was going to do it too.
Wish + Past Perfect(we regret about something in the past)
I wish I had simulated this object with the help of a new computer. (I didn't simulate)
I wish I hadn't replaced parts in the machine. (I replaced)
3. I wish I could(do something) = I regret that I cannot do it.
I'm sorry I can't help you. I wish I could calculate the resistance in this task. (but I can't)
I wish I could have (done something) = I regret that I could not do it.
I heard you bought a new computer. I wish I could have gone to look at it. (but I couldn't go)
4. I wish (somebody) would (do something)
(we would like something to happen)
I wish my computer would outstrip my friends' ones.
I wish somebody would help me to measure current in my laboratory work.
1. Fill in the table.
2. Put the verbs in brackets into the correct form.
1. If I (know) the concentration of impurities in the solution, I would dope it.
2. Unfortunately I forgot your e-mail address when I went on holiday. If (I/have) your e-mail address, (I/send) you a message.
3. If you were me, how you (measure) the height of a potential barrier?
4. If I (have) a chance, I (eliminate) a high density area.
5. I'm tired. If (I/not/be) tired, I (do) all measurements.
6. The scientists were not very busy last year. If (they/be) busy, they (not/obtain) so many substances in scientific laboratories.
7. I wouldn't mind helping you in the laboratory if the results (be) better.
8. I (not/experiment) with this matter if I (be) you.
3. Write a sentence with if ... for each situation.
1. The process of rock age determination is too complex, so I'm not going to do it. I'd ... if ...
2. I can't meet you tomorrow. I have to install new equipment in the laboratory. If ...
3. I don't see you very often because I'm designing a new installation. If ...
4. We can't determine the plate current of a triode. We have to measure the temperature of the cathode and the voltage on the plate. If ...
5. P-type and N-type regions and a junction between them appeared in a silicon crystal because donor atoms were at one end and acceptor atoms were at the other end of it. If donor atoms ...
6. I didn't determine voltage because I didn't know current strength and resistance. ...
7. You didn't replace parts of this machine - that's why it doesn't work now. ...
8. Kate didn't obtain correct result because she didn't change a sign in a fraction. ...
4. Write your own sentences beginning I wish...
1. (somewhere you'd like to be now - in a computer laboratory, at the university, on a tour etc.) I wish I ...
2. (something you'd like to have - iPad, PSP, iPhone etc.) I wish I ...
3. (something you'd like to be able to do - to fix a computer, to drive a car, to program in C++ and Java easily etc.) I wish I ...
4. (something you'd like to be - a scientist, a software developer, a system administrator etc.) I wish I ...
5 . Write sentences beginning I wish...
1. I don't have a notebook (and I need it). I wish ...
2. I have to install a new computer at the office tomorrow (but I'd like to stay at home). I wish ...
3. I can't obtain perfect results in physics (and I'd like to). I wish ...
4. There was a job of specialist in the sphere of computer security advertised in the newspaper. I decided not to apply for it. Now I think I was wrong. I wish ...
5. When at school, I didn't learn to program in C++. Now I regret this. I wish...
6. I've bought a lot of hardware to my computer and now I'm short of money. I wish...
6. Put in wish(ed) or hope (d).
1. I ... you a good luck at your entrance exams.
2. Enjoy your new creative work. I ... you have a great time.
3. Good bye. I'm going on business. I ... you all the best.
4. I heard you designed a new device, I ... all your dreams come true.
5. I ... you luck in buying a new computer. I ... it works well for you.
7. What do you say in these situations? Write sentences with I wish ... would ...
1. You are in N.Y. on business now. You want to fly back home as soon as possible, but there is a flight delay because of the weather.
You say: I wish the weather would ...
2. You are waiting for results of the experiment. You're getting impatient.
You say to yourself: I wish ...
3. You're looking through a lot of advertisements in order to find a job. Employers won't take you.
You say: I wish somebody ...
4. You can hear a perforator working. It's been working for a long time and you're trying to study.
You say: ....
For the following situations, write sentences with I wish ... wouldn't ...
5. You have been doing monotonous work at your job for years. You think you are worthy of a better fate. You say to yourself: I wish I ...
6. Your friend does everything very slowly. You don't like this. You say to your friend: I wish you ...
7. Jack gives his password to unknown people. This annoys you. You say to Jack: ...
8. Are these sentences right or wrong? Correct them where necessary.
I wish my colleague would be here now. -
I wish my colleague were here now.
1. I wish you would select the model of a computer at last.
2. I wish I would have more free time to mend all home appliances.
3. I wish our TV set would be bigger.
4. I wish the circumstances would change.
5. I wish you wouldn't be on business most of the time.
6. I wish our equipment wouldn't be so old.
Language Work | Put the verbs in brackets into the correct form. | Use your own ideas to complete the sentences. | Match the following sentences with their translations. | Semiconductors of N-Type and P-Type | Read the text again and select from the multiple choice the only solution to each problem. | The P-N Junction | The P-N Junction | Joining P- and N-Type Germanium | The Prepositional Absolute Participial Construction |