Do "think about" and "think over"have the same meaning?

Two queries about two sentences. 1. I can not learn such a know-how with books what they are. Query: Is this sentence grammatically correct? I understand the "with books what they are" with a sentence this way: because books are what books are. Is my way to understand it correct? 2. I don't need any supernatural manifestation, just hard work and dedication. That's what it takes to be great. Query: Is this sentence grammatically correct? I understand the "That's what it takes to be great" this way: Hard work and dedication is what it takes to be great.→ What to be great man takes is just hard work and dedication. Is my guess correct?

I've been an active student on italki for the past eleven months, and I have been immensely enjoying and benefiting from Tarek's Levantine Arabic classes in particular. I recently learned that italki plans to change the certification requirements for instructors, requiring them to provide certification in business, standardized test preparation, or children's education. I believe that this policy suffers from a serious blindspot. Many of your students, myself included, have come to the study of foreign languages out of an interest in literature and informal conversation. It seems to me ridiculous that a teacher holding a graduate degree in the humanities would be considered uncertified under the new policy, while a teacher holding an MBA would be considered certified. Tarek, to take the example that concerns me most, holds a PhD in Irish Literature, is a native speaker of Levantine Arabic, and has extensive teaching experience in a university setting in addition to hundreds upon hundreds of hours of experience teaching Arabic (both MSA/Fusha and Levantine) as a second language. He is, to my mind, eminently qualified to teach Arabic courses on this platform, and the platform is lucky to have him. If he is no longer supported as a teacher under the new policy, I will without hesitation take my business elsewhere, and I will advise the friends and family members to whom I once heartily recommended italki to do the same. The prioritization of business accreditation over extensive training in the humanities betrays a serious misjudgement of why many of us study languages in the first place. It ignores the most meaningful and beautiful forms that the use of language can take. I urge italki to reconsider this policy, which to my mind would spell ruin for the italki platform as a whole.

It's rainy today. Back home, I saw Mom cleaning out and inspecting everything in the fridge. Did she see a cockroach in there? No, it was Dad. It turned out that he baked pizzas a few days ago and left a large chunk of cheese loosely wrapped in a piece of paper behind something at a tucked-away corner in the fridge. Then, obviously it had gone right out of his head. Mom discovered the moldy, greenish chunk when she was reaching for something to whip up our dinner. Yeah, my hygienic mom’s been freaking out. Mold is contagious, which means it can contaminate other food. Is she going toss everything away? I haven’t seen Mom being so mad for quite a while. Dad's going to have a rough day. This is all on him.

🌎👋🏻🌎👋🏻 Hello, please i need to know if this sentence correct, its a thanks for an author for his book ( just received it yesterday, so it’s officially here in London, i found myself relating to certain parts, thanks for showing your words the light and sharing that with us ) i’m confused is it showing or shown, sharing or shared ?