认识 is used to + somebody, means we are know each other. ( sometime, 认识+ sth. means recognize... for example, I'm sorry that I 认识到it's my fault ) 知道 is used to + somebody or sth. means mastery or know. + somebody means I know him, but maybe he dosen't know me. + sth. means I've heard it or I know this ( news or knowledge....)

haha, I often pose with a 'V' sign when we were taken photographs I don't know other pose else. It's very interestingly to tell you : In China, people born in 1960~1970, they are very traditional, their pose is very serious. only hold hand together before or after their body. people born in 1970~1980, they are try to open, their pose is hands were acrossed inarm.or put hand on waist. people born in 1980~1990, they were called behind 80, they try do some fangle.they pose V means happy.( but some people will try to do other laughable pose.) people born in 1990~2000, they were called behind 90, they often make some pretty face.maybe affect by Korean. It's very interesting.

When we know bad things has happened, and the result is obvious, but we hope it will be ok, then we side it will be ok.会好的， 会没事的。 When I don't know if bad things will happen, and I'm not sure the result. I will say it won't be happen in the future（it's my best wish）.不会有事的。不会发生糟糕的事。