In can mean both, depending on the context and situation.

Yes, but there’s a subtle difference between “I like tea” and “I like teas”: 1. “I like tea”: This means you like tea in general as a drink. It refers to tea as a broad category, without specifying types or varieties. 2. “I like teas”: This suggests you enjoy different types or varieties of tea (e.g., green tea, black tea, herbal teas). Using the plural implies you’re referring to specific kinds of tea. In both cases, you’re expressing a general preference, but the plural “teas” adds a layer of variety to your liking.

I want to study languages more but recently I haven't had much time . I’m in a hotel now. Actually, I came to work abroad two weeks ago. Here, I have to wake up at 3am and have to start to work at 5am. I finish work very early at 3pm, but still I'm always exhausted. Therefore, I don’t have the energy to study languages. I take a bath, eat dinner and that’s it. So I decided to write a daily log everyday as much as I can, because I don’t want to forget my English. Maybe tomorrow I’ll write a log to use Chinese. So please help me guys. Please tell me my mistakes. Please send me correct examples/corrections. Thank you for reading my messy sentences.