hello substitute can translate it as 代 or替 She's a substitute teacher. 她是个代课老师 John sprained his ankle yesterday, Bill is going to substitute for him during today's match. John 昨天扭伤了脚踝，bill 会代他参加今天的比赛。 You can substitute aspartame for sugar in your coffee if you're trying to lose weight. 如果你想减肥的话你可以用阿斯巴甜代替咖啡里的糖。 like can translate it as 喜欢 enjoy can translate it as 高兴 Thank you for talking with me, I enjoyed our conversation. 谢谢您和我谈话，我很高兴能和您对话。（但中国人很少这样说，这只是翻译，中国人可能会说，多谢您的教诲，听君一席话，胜读十年书） I enjoy going to the movies 去看电影我很高兴 Even though they have been married for a long time, John and Mary still enjoy each other's company.虽然john和Mary结婚已经很长时间了，但他们还是很喜欢呆在一起（本人水平有限请大家指正） you can use 有意思 or 有趣 to translate ‘fun’ I don't like my job, it's no fun! 我不喜欢我的工作，太没意思了。 It's no fun talking to you if you will only answer yes or no. 如果你只回答是或不，拿咱们的谈话就太没意思了 You have to make learning a language fun, or you'll quickly be frustrated. 你必须让语言学习变得有趣，否则你很快会举得沮丧的。 'Cool' in meanings fashionable usally translate to 酷 in recent years. this word comme from english. I like your car, it looks cool!我喜欢你的车，他很酷。 Your new hairstyle looks cool!你的新发型真酷。 John has the coolest job in the world! He gets to play with all the newest cellphones. john的工作是世界上最酷的了，他总能用上最新的手机。 When you approach that girl, you have to act cool, or else she'll reject you. 你跟那姑娘搭讪的时候得装酷，否则他一定会拒绝你的。 You have to learn to be cool under pressure, don't say things you'll regret later. 面对压力你需要保持冷静，否则你会后悔（本人水平有限请大家指正） My english is very poor. If there is any mistake in english. Hope readers can correct the mistakes for me.