Language work

Date: 2015-10-07; view: 466.

The P-N Junction

Unit 10

DISCUSSION

1) How would you explain the statement "The world operates on credit"?

2) What kind of policy would you establish to handle delinquent accounts'? Why?

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

or

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 wouldn't wander freely in the lattice.

I wish I determined…

wish + Past

For example:

· I wish I measured these parameters more carefully.

(=I don't measure them carefully)

· I wish I could gain the higher results. (I can't)

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 … )

or

For example:

· 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

For example:

· I wish I had constructed my replica. I would have used it now. (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)