'twas

Contraction

 * 1) * 1779,, “”:
 * ’Twas grace that taught my heart to fear, /
 * 1) * 1823, perhaps, “”:
 * ’Twas the night before Christmas,
 * 1) * 1871,, “”, in :
 * ’Twas brillig, and the slithy toves / Did gyre and gimble in the wabe; /
 * ’Twas brillig, and the slithy toves / Did gyre and gimble in the wabe; /

Antonyms

 * ’twasn’t