In a stage whisper, Mrs. Grammar Person explains that although she is your true friend, spell-check is not. Spell-check is fickle and delights in trickery. He will make you believe that it's morning when, in fact, you're in mourning, or that you should waver when you are seeking a waiver. He doesn't care if your simple please turns into multiple pleas, and he will most likely desert you if you ask for dessert.
Mrs. G.P. wishes to remind you for whom the bell tolls (if you must ask, it tolls for thee). When in doubt as to whether to use who or whom, simply substitute the word him. If him will do nicely, then the word you want is whom. Mrs. G.P. shudders to think that you would even consider writing "For he the bell tolls." She keeps her smelling salts handy, just in case.
Being an agreeable person, herself, Mrs. G.P. insists that all her nouns and verbs also agree; therefore, a swarm of bees searches for honey, but the two straggler bees search on their own. How sweet the sound of proper grammar!
While Mrs. G.P. has nothing but admiration for writers who seek perfection, she cautions that nobody is perfect (except for her, of course). To that end, she cautions you about using the pronoun "I" when the word you seek is "me". To write that "the teacher allows Joe and I to go to the playground" is tantamount to writing, "the teacher allows "I" to go to the playground." Whenever she sees this transgression, Mrs. G.P. slams the offending book shut, never to be opened again.
Now, it is time to bid farewell to Mrs. Grammar Person, but, before she takes her leave, she asks you to remember that: it is always darkest before the dawn, when the going gets tough, the tough get going, you should keep your chin up and, if you don't stop using clichés, Mrs. Grammar Person will march back here and rap your knuckles with a ruler!
Once she is satisfied that you have learned your lesson, Mrs. G.P. gently pats you on the head and heads off to the library, casually tossing out her final words of wisdom , words that shake your very foundation: "Remember, my dears, you can end a sentence with a preposition and you can split an infinitive!"