Affect vs Effect

[tragalefas]

How are these words used?

[allenman]

Generally...
a) Affect -- a verb
b) Effect -- a noun
c) Effect -- rarely used as a verb but can be in specific circumstances. Most often mistaken by those wishing to write Affect. Learn (a) and (b) first before attempting the subtle use of (c).

The effect of the tsunami in Japan is that many lives were lost.
The tsunami in Japan affected many lives in Japan.

Not a teacher

[wq.denis]

Word (software) has corrected me every time i used "effect" rather than "affect" as a verb and never care until i saw your question.

Thank you

[Raymott]

You could do worse than looking here:
UsingEnglish.com ESL Forum - Search Results

Also search for the two terms separately.
'Affect' can also be a noun. Maybe a dictionary could help?