Where does the apostrophe go? Someones car lights have been left on.?

Question:
Before or after the ending s in Someones?

Answers:

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i dont think it would be appropriate for your sentence at all

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Someone's

What steps should I take, at the scene, if I'm in a car accident?

'Someones car lights have been left on'
means
the lights of the car of someone
Find the word that shows the 'owner'.
The apostrophe +s goes at the end of that word (the owner)

Clutch & Brake!?

someone's car lights ...

Driving laws in michigan?

The unit you're adding is 's and to find out where to put it, turn it round to think about who is the owner or owners.
eg the dogs lead = the lead of the dog
so it's the dog + 's lead.

Does any body know of any sitres for taking practice drivers and road sign test?

For the plural, eg the dogs leads
it's the leads of the dogs, so you have to add 's to dogs.

You remember that cars aren't the only thing that can be recalled by their maker?

However, this would sound peculiar, so we drop the final s.
It should be the dogs's leads but we write dogs' leads.

Why do people drive over the speed limit?

The only time you add 's to a word with an s already, is in religious names eg
St James's Square (the Square of St James)

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Cathy

Does this annoy you as well?

Before the s.If the word ends with an s, it goes after the s..

I need info on accident dec 29th 1990. interstate 44 this was a fatal accident?

Before the s.