Galatians 3:29

And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise.

If you are Christ's, then you are Abraham's seed and heirs according to promise.

And if ye are Christ's, then are ye Abraham's seed, heirs according to promise.

and if ye `are' of Christ then of Abraham ye are seed, and according to promise -- heirs.

And if you belong to Christ, then you are Abraham’s seed and heirs according to the promise.