Unit 46. Can you tell me where …? Do you know what …? etc.

We say: Where is the station?
but
Can you tell me where the station is?
(not ‘Can you tell me where is the station?’)
also:

I know
I don't know
Do you know
I can't remember
I wonder
(etc.)

where the station is (?)

Who are those people?
Where have they gone?
How old is Tom?
What time is the bus?
When is Ann going away?
How much is this camera?
Why were they late?
What was he wearing?

but

Do you know
I don't know
I know
Can you tell me
I can't remember

who those people are
where they've gone
how old Tom is
what time the bus is
when Ann is going away
how much this camera is
why they were late
what he was wearing

Questions with do/does/did (Present Simple and Past Simple):

Where does he live?
Do you know where he lives?	(not ‘Do you know where does he live?’)

How do aeroplanes fly?
What does she want?
Why did she go home?
Where did I put the key?

but

Do you know
I don't know
I know
Can you tell me
I can't remember

how aeroplanes fly
what she wants
why she went home
where I put the key?

Questions beginning Is …? / Do … ? / Can … ? etc. (yes/no questions):

Is Jack at home?
Have they got a car?
Can he help us?
Does Ann smoke?
Did anybody see you?

but

Do you know
I don't know

if
or
whether

Jack is at home
they've got a car
he can help us
Ann smokes
anybody saw me

You can use if or whether in these sentences:
- Do you know if she smokes? or Do you know whether she smokes?

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