sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What is the use of spring washer?
 sentence 2: What is the effect of using two spring washers? sentence 1: How often do most people have sex?
 sentence 2: How often do people have sex? sentence 1: What is the bond order of CO32-?
 sentence 2: What is the bond order of CO? sentence 1: How can I improve my conversation skills so that I can have long interesting convos?
 sentence 2: How do I improve my social skills so that I can have casual conversation?
not same meaning
not same meaning
same meaning
not same meaning
same meaning