Gramma question ''I bet if I was there, you wouldn't have kissed Mary.'' Why using ''have''? Why can't say ''wouldn't kissed?

what are the differences between ''garment'', ''clothing'' and costume? What are the differences of those nouns​? Thank you for answering my question.

play piano or playing piano? When I want to describe my hobby, what should I say? I like play piano or playing piano? (PS: Grammar is confusing me!)

What are the different between Gravitate and Move? Under such circumstance, I naturally gravitated to London. ( it is a subtitle from a TV series, Sherlock Holmes＞字幕寫：有鍳於此，我自然搬來了倫敦。) My question is : why it use gravitate but move? > Gravitate = move slowly? > Move seems more directly to say from one location to another one?

Travel in Vietnam In the past 9 days, I was travel in Vietnam, which is next to Cambodia and China. I think Vietnam is not too far from China because I just took around one and a half hour to get there. My first impression of Vietnam is that the weather is terribly hot and their language is familiar with Thailand.Besides that, the outlook of the people is not much different with Chinese. My second image of Vietnam was that there were many foreigners and travelers, especially American and Russian and I thought it might be related to the history of Vietnam. Since I'm a traveler as well, I need to speak English to the local people and foreigner either. I very soon recognize how worst of my spoken English. I feel ashamed and embarrassing when people can't understand what I'm saying. Terrible! I thought I would able to say fluent and complete conversation but silenced instead. On the sidewalk, there were many street vendors selling baguette(long French bread), so it was clear to notice that Vietnam was dominated by France. The another common street food is noodle with soup, it's totally tasty for me because I'm a maniac of noodle. The final confusing question I have during the trip, why some of the foreigners look unfriendly on their faces, are they didn't like Chinese? Why they always seems arrogant? Are they sinophobia? To sum up, this trip broadened my horizons and recognize myself that my English still need to improve harder and farther.