Past Tense

[jack]

Somebody said it was you. <--correct? why?
Somebody said it is you. <--correct? why?
Somebody says it was you. <--correct? why?
Somebody says it is you. <--correct? why?

[jack]

"I am looking for a worker name Alice." <--correct? what does it mean?
"I am looking for a worker named Alice." <--correct? what does it mean?

[Tdol]

'called' would be better. However, the first would always be wrong- the second might be OK.

[Casiopea]

1. "I am looking for a worker name Alice." <--correct? what does it mean?
2. "I am looking for a worker named Alice." <--correct? what does it mean?

1. is incorrect. "name" functions as an adjective here, so it takes -ed, like this,

I am looking for a worker named Alice.

Adjective Test
Question: What kind of a worker?
Answer: A worker who is named Alice.

[jack]

"I will get you banned." <--correct?
"I will get you ban." <--incorrect? why? is it because "get" is in the sentence which is a 'to be' so "ban" should be "banned"?

[Tdol]

'Get' is often used instead of 'be' in passive sentences, so you are quite right.

[jack]

"Are there any training roads with driving routes map out?" <--incorrect? why?

"Are there any training roads with driving routes mapped out?" Is this whole question written out correctly? why?

[Casiopea]

"I will get you banned." <--correct?
"I will get you ban." <--incorrect? why? is it because "get" is in the sentence which is a 'to be' so "ban" should be "banned"?

I will get you banned.

Structure
Subject: I
Verb: will get
Object: you
Object Complement: banned (adjective)

[Tdol]

"Are there any training roads with driving routes mapped out?" Is this whole question written out correctly? why?

It is correct, but you could look at it as 'routes that have been mapped out'.

[jack]

"I like it demolish." <--correct? why?
"I like it demolished." <--correct? why?
"I like it demolishes." <--incorrect? why? Why doesn't "it" makes "kill" plural?