Liveinjapan

“His resignation will affect what the world leaders think of our country.

His resignation will affect the ways the world leaders think of our country. Many people would use "way" in the singular, although "ways" is the correct form  -  unless you wish to imply that all leaders would think in the same way.

Are my senteces sentences correct and do they mean similar? are they similar in meaning? / do they have similar meanings? / are their meanings similar?  (Yes, and yes.)

If so, If I replaced replace of by with about then the meaning changes, right? Because think about means to imagine, right? I'll say "No." These are two separate and distinct fixed expressions:  In The Wee Small Hours . . . . You lie awake and think about the girl,   ///  What do you think   -   about that?

I think if you used past tense (replaced) you would need to say, "then the meaning would change."    /   "Replace by" may be okay.  For some reason I only use it in the passive.  " . . was replaced by . . "  ”

How we think would normally be used to describe the process of thinking, not the content. 

People sometimes say things like, "I don't care how you think of me," which in my opinion actually describes the process:  You may think of me as a fool; you may think of me as reckless.  It's sort of a grey area.  I take it as a different statement from, "I don't care what you think of me," although the intent may be the same.

Best wishes,   - A.