How to use 一直????

“一直” is an adverb meaning "always".
1.It means that it doesn't change in one direction.
For example：请一直走。
2.Means that the action is always uninterrupted.
For example：雨一直下。

3.Emphasize the range of reference.

For example：我从7点一直到8点都在工作。

一直+V

always: 我最近一直游泳

straight：你一直走，不要停

表示习惯没有改变。还有一个就是永远

Kind of the same use as always

一直means always

Subj. + 一直 + Predicate

 

like always, I “always” go to work by bike. 我“一直”上班骑自行车。

一直means no change; constantly; forever and always.

一直, as an Adverb, have 3 means: check the details here, https://www.cchatty.com/dict/18214

• straight
• continuously; always; all along
• all the way

It's an adverb like in English. 我住在北京。I live in Beijing. 我一直住在北京。I have always lived in Beijing. Another usage is for direction. 往前走。 Go forward. 一直往前走。Keep going straight ahead.