Some verbs MUST HAVE AN OBJECT ...

1. Some verbs MUST HAVE AN OBJECT.
For example, the verb 'use'.
You CAN say:
I use MY CAR every day. I use THE SAME SHAMPOO all the time. We use A COMPUTER to access the internet..
You CAN'T say:
Every day I use.
In the dictionary, these verbs are called 'TRANSITIVE VERBS' and sometimes have the letters 'vt' (verb transitive). In some modern dictionaries this may be 'vn' (verb + noun).
Look at the study pages in your dictionary!

2. Some verbs DON'T USUALLY HAVE AN OBJECT.
For example, the verb 'work'.
You CAN say:
From Monday to Friday I work. Because I need money to live, I have to work.
You CAN'T say:
I work an office.
you CAN'T say:
I work a secretary.
IF YOU WANT TO PUT A NOUN after 'work', you usually need A PREPOSITION:
I work IN AN OFFICE.
I work AS A SECRETARY.
In the dictionary, these verbs are called 'INTRANSITIVE VERBS' and sometimes have the letters 'vi' (verb intransitive). In some modern dictionaries this may be 'vpr' (verb +preposition...) etc. Look at the study pages in your dictionary!

3. Some verbs CAN BE USED IN BOTH WAYS.
For example, the verb 'drink'. You can use drink WITH an object or WITHOUT an object.
She picked up her cup and drank.
He was so thirsty that he drank the whole glass without stopping.
There are many examples of this.
Speak: She stood up and began to speak.
Everyone was silent. Nobody spoke a word.
I will have to speak to my friend about this.
See: It's dark. I can't see.
I had a good seat at the theatre. I could see everything clearly.

4. When a verb MUST HAVE AN OBJECT, if we PUT THE OBJECT FIRST, we must use the PASSIVE FORM of the verb (or use a different verb!)
For example, 'steal' must always have an object. So:
Somebody has stolen her handbag.
Her handbag HAS BEEN STOLEN.
Her handbag has GONE.

They have spent a lot of money on this.
A lot of money HAS BEEN SPENT on this.