1. Without indicates the absence of somebody.
I can't live without you.
Please don't leave without me.  

2. Without means not having.

Pattern: verb + without + (any) noun

That young mother manages without any help.

We are without money this month.                      

3. Without means not using.

Pattern: verb + noun + without + noun
We did the crossword puzzle without a dictionary.
She can't read without her glasses.                                                                                                              

4. Without means not performing an action.

Pattern: without + verb in gerund form
She passed the test without studying.
He left without saying good-bye.

5. Expressions.

without a doubt—certainly
She is without a doubt the best chairman we have ever had.                

without fail—a demand or promise to do something
Be here at six A.M. without fail.
I will finish within three days without fail.                                                                                                                          

without ceremony—immediately and quietly
He took charge without ceremony and began to work.          

that goes without saying—that is understood to be true
You will be paid well for your work; that goes without saying. 

Twitter