How do I say in Chinese?我用汉语怎么说(or 讲)?
► You look like someone: 你看起来像某(个)人
• You look like Jay Chou.你和周杰伦好像 or 你长得很像周杰伦
• You look like my father. 你看起来和我爸爸一样 or 你和我爸爸长得好像
► I think: 我想 or 我认为
• I think you are very nice.我认为你很好
• I think you are intelligent.我认为你很聪明
► I would like to:我愿意 or 我想要
• I would like to speak Chinese fluently.我想说(一口)流利的汉语
• I would like to visit Guangzhou someday.我想将来某天去杭州玩 or 我想哪天去杭州逛逛
You can translate them into different forms as we have different speaking habits. Best wishes for you~~