Present / Past Tense

[jack]

What do these mean?
1. She asked me if I wanted to work on Saturdays.
2. She asked me if I want to work on Saturdays. (This sounds correct but it looks wrong. If this is wrong, why?)

[Casiopea]

What do these mean?
1. She asked me if I wanted to work on Saturdays.
2. She asked me if I want to work on Saturdays. (This sounds correct but it looks wrong. If this is wrong, why?)

Past
She asked me (two minutes ago; yesterday; last week) if I wanted to work on Saturdays.

Reported Speech
She asked me (two minutes ago; yesterday; last week), "Do you want to work on Saturdays?" (Her exact words)

[jack]

Scenario: We are walking in the mall and he says he wants to go to that store.
1. Matt said he want to go to that store. (So no matter what, this is wrong? I hear people say this all the time. So 'want' should be 'wanted' ?)

[jack]

Scenario: We are walking in the mall and he says he wants to go to that store. 10 minutes later...
1. Matt said he want to go to that store. (So no matter what, this is wrong? I hear people say this all the time. So 'want' should be 'wanted' ?)

[jack]

What about these ones:

http://www.google.ca/search?hl=en&q=...t+will%22&meta=
I got tons of results for 'it said it will"

1. He said he will do it. (This is not reported speech, so this is incorrect right? 'Will' should be 'would' ?)
2. It said it will account for $1.7 billion in annual e-commerce transactions. (What about this one then? How does it work? How come 'will' is not 'would' ?)

Thanks.

[jack]

Past
She asked me (two minutes ago; yesterday; last week) if I wanted to work on Saturdays.
Reported Speech
She asked me (two minutes ago; yesterday; last week), "Do you want to work on Saturdays?" (Her exact words)

1. Forecasters said freezing temperatures will extend into next week.
2. She asked me if I want to work on Saturdays. (How come this is incorrect and #1 is correct?)

What do these mean?
3. Forecasters said freezing temperatures will extend into next week.
4. Forecasters said freezing temperatures would extend into next week.

Thanks.