要 / QUITE CERTAIN FUTURE
要 /yào/ means many things. It can mean TO WANT, TO NEED, SHOULD, it also expresses future tense – complex explanation HERE
We can translate the sentence 我要喝茶 /Wǒ yào hē chá/ as I WANT TO DRINK TEA or I WILL (I’M GOING TO) DRINK TEA
When we WANT to do something, we ARE ABOUT to do it – that might be the reason why these concepts are so close in Mandarin
Because 要 /yào/ can mean so many things, you shouldn’t interpret it strictly as a future tense
You should understand it simply as 要 /yào/, the total of these meanings (TO WANT, TO NEED, SHOULD, future tense) and translate it based on the context
Here are some examples of 要 /yào/ indicating the future tense.