Was / Were (weak and strong forms)

Was

British English: weak forms /wəz/ or /wz/ (the second form is only produced in rapid speech)
                          strong form /wɒz/

American English: weak forms /wəz/ or /wz/ (the second form is only produced in rapid speech)
                               strong forms /wɑːz/ or /wʌz/


Were

British English: weak form /wə/
                          strong form /wɜː/

American English: weak form /wɚ/
                               strong form /wɝː/