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Hello

In type 1
Should my mother call me Tell her I'm not feeling too well

In type 2
Were they to arrive tomorrow We would have to buy some food

In type 3
Had you seen what I saw you would have also believed it

http://english.baladre.org/sedaviwebfront/conditionalTheory.htm

When should I use inverted conditional? If I use sentence above like below is there any change in the meaning

Thanks

Normal conditional sentences

if my mother call me Tell her I'm not feeling too well

if they to arrive tomorrow We would have to buy some food

if you seen what I saw you would have also believed it
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Hi,

You need to correct your punctuation and capitalization in these examples.

In type 1
Should my mother call me, tell her I'm not feeling too well.

This is rarely used in everyday English. It sounds literary and old-fashioned.

In type 2
Were they to arrive tomorrow We would have to buy some food
This is not often used in everyday English. It sounds literary and old-fashioned.

In type 3
Had you seen what I saw you would have also believed it
This is rarely used in everyday English.

http://english.baladre.org/sedaviwebfront/conditionalTheory.htm

When should I use inverted conditional? Seldom or never.

If I use sentence above like below is there any change in the meaning

No, but note my edits.

Normal conditional sentences

If my mother calls me, tell her I'm not feeling too well. OK

If they to arrived tomorrow, we would have to buy some food.

If you had seen what I saw, you would have also believed it.

Best wishes, Clive
Comments  
Should my mother call me, tell her I'm not feeling too well.
Were they to arrive tomorrow, we would have to buy some food.
Had you seen what I saw, you would have also believed it.

If my mother calls me, tell her I'm not feeling too well.
If they to arrive tomorrow, we'll have to buy some food.
If you'd seen what I saw, you'd have believed it too.

The first set of sentences are formal/literary. The second set are conversational. The meaning is the same.
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 Clive's reply was promoted to an answer.
sunsailWhen should I use inverted conditional?
They go down well in fairy tales.