Instructions for Usage Notes
Choose one assignments  from the following list and answer the  question

    What do Bedford, The Elements of Style, Random House, and Modern English Usage say about the following words?

The books can be obtained from the library or from me.

These problems are definitely mentioned in The Elements of Style.  They might not be in the others, but do check.
If there are two words on a line, it means that the usage problem is that these two words are often confused.  Together they count as one assignment.
As assignments are chosen, I will change their color to red so that you know they have been done.

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allusion, illusion    an allusion is an indirect reference, an illusion is a false vision

among, between   between for two objects, among for more than two

being

case

comprise

different

due to 

effect different from "affect"  effect means to accomplish

factor

farther, further "farther" should be used to compare distances only

imply, infer 

in terms of

lay, lie lay is transitive and needs an object "I lay down the book", lie is intransitive.

less, fewer  the "rule" is that fewer is used for things you can count

most, almost  almost "means not quite"; don't use most when you mean almost

ongoing  "continuing" is usually better

presently

than, then then has the sense of time or consequence

try

utilize variation of "use"

while

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The Bedford Handook, Diana Hacker, 2006

The Elements of Style, W. Strunk and E. B. White, 3rd Ed, Macmillan, 1979

The Random House Handbook, Frederick Crews, 1974

A Dictionary of Modern English Usage, H. W. Fowler, 2nd Ed, 1965