Here are the main ones to look out for:
• Adverse means detrimental and does not mean averse or disinclined.
Correct: “There were adverse effects.” / “I’m not averse to doing that.”
• Appraise means to ascertain the value of and does not mean to apprise or to inform.
Correct: “I appraised the jewels.” / “I apprised him of the situation.”
• As far as means the same as but cannot be used the same way as as for.
Correct: “As far as the money is concerned …” / As for the money …
• Begs the question means assumes what it should be proving and does not mean raises the question.
Correct: “When I asked the dealer why I should pay more for the German car, he said I would be getting ‘German quality,’ but that just begs the question.”