Knowing When to Use "Who" or "Whom" in a Sentence

Have you ever stopped and think if you should use "Who" or is it "Whom" in a sentence?  I have to admit, I use to ask myself that often.  But I found a simple test to know which one should be use.  Just replace:

• Who = He/She
• Whom = Him/Her

Let's apply the test in examples:

1. Who loves orange soda?  (He or she loves orange soda?)
2. Whom shall it be? (Should it be him or her?)

See?  With the test, it becomes easy to determine. Now, we can always abide by the grammar rules and avoid this common grammatical error.