Inversions

Only if have you a key can we get into the house.

Only if you have a key can we get into the house.

Only if you have a key we can get into the house.

Only if have you a key we can get into the house.

Should the weather get any colder, will we turn on the heating.

Should the weather get any colder, we'll turn on the heating.

Should get the weather any colder, will we turn on the heating.

Should get the weather any colder, we'll turn on the heating.

So rarely visits he us that I can hardly remember what he looks like.

So rarely he visits us can I hardly remember what he looks like.

So rarely does he visit us that can I hardly remember what he looks like.

So rarely does he visit us that I can hardly remember what he looks like.