One use of may has to do with permission. The parallel use of can has to do with ability. "No, Johnny, you may not go skating. The ice is too thin at this time of year." You look at the pond and you think you can skate on it. You can't. You'll fall in. The confusion comes from the fact that both are used to express potential. It may rain at any time. It can rain at any time. These have very slight differences of meaning because can carries the implication of ability. It may rain today, so I'll take an umbrella with me. The leeward side of the mountains is pretty dry, but it can rain for days on end on the windward side.

They'd made money farming. They'd made money by farming. They'd made money out of farming. There's a slight sense of connectivity, as though the money still smelled of manure as it went into the factories. The ex-farmers were relieved to be able to sit at city tables and clip their dividend coupons now. Incidentally, I share Jane Jacobs's view, in "Life and Death of the Great American Cities," that industry and trade are prior to agriculture. Agriculture is just the, ahem, farming out of the dullard work of watching plants come up once the hanging gardens of your Babylon have become so productive that you want to reproduce them on the outskirts of your village-city. We stroke the farmers and tell them they're the foundation of society because we want them to shut up and vote conservative. In reality, the foundation of society, the source of all wealth, is thought and cooperation. These are the two things that make helpless, naked, pink little humans able to defeat mammoths and sabre-toothed tigers. Discrimination, an act of intellect, is what makes us able to select plants to keep outside our shelters, inventing agriculture, as we gnaw on our barbequed tiger.

Felix, Both Yanyan and Halyna are right. I'd just add that it's a very odd sentence. It's not so much that it's stupid as it is that it's pointless. Obviously books take effect through the people who read them. Duh. Grammarly, the popular grammar app, wants a comma after the "obviously" in the sentence above. The New Yorker has a cartoon this week in which the lawyer is counselling the poor distressed client, "No, the refusal to use the Oxford comma is not grounds for divorce." I don't use their furshlugginer comma because I consider the "obviously" to be the point of the sentence, not a throw-away introduction. It's not so much that books take effect through being read as it is that this is so obvious as not to be worth saying.

My irrefutable father

 

He complains nothing as a breadwinner <em> I don't know what you're trying to say.  What is "he complains nothing" all about?</em>

 

who suffers a lot stresses.  <em>Stress</em>

When I encounter great difficulties  <em>difficulty</em>

in study and even want to give up it.He would say:"daughter,don't try to escape from reality ,you should and must act boldly and confidently.Only in this way can you find everything will be fine at last.  <em>This is a little bit stiff and formal, but clear and grammatically correct, so good.</em>

<em></em>
In addition,he is a father who shaped my distinct  <em>?? Wrong word.  "character" maybe?</em>

 by encouragement and persistence.Everytime when he received my report card he never blames me but enourage me no matter how many scores i got.  <em>"No matter what my marks were."  "scores" in sports.  "Marks" or "grades" in school.</em>

 

He told me that honesty is the best policy .I Still many times I failed to pass my mathematics and it was he who offered me a shoulder to cry on.I will always remember one words that my father have said.Our greatest weakness lies in giving up ,the most certain way to success is always try just one more time.
Finally,if my father can understand English and sit in front of me .I am sure he will feel pride and smile .Many hugs to my father and thank him for what he have done for me.I love you dad!

 

<em>Good stuff overall!</em>