'twas

'twas

 (twŭz, twŏz, twəz when unstressed)
Contraction of it was.

'twas

(twɒz; unstressed twəz)
contraction of
it was

'twas

(twʌz, twɒz; unstressed twəz)
contraction of it was.
References in classic literature ?
"'Twas so civilian-like," said poor Dinah, who hated her husband's hankering for his old life.
I knew 'twas a spring draf' goin' home, for there's no rig'mint hereabouts, more's the pity."
'Twas right, said they, such birds to slay, That bring the fog and mist.
'Twas sad as sad could be; And we did speak only to break The silence of the sea!
If 'twas a woman I'd be willin', for they leave peace behind 'em when they go."
"'Twas hasty puddin', as ye say," said her husband, "and hurry-up turnips and get-a-move-on-ye coffee.
"Miss Pollyanna told me long ago that she couldn't tell her, 'cause her aunt didn't like ter have her talk about her father; an' 'twas her father's game, an' she'd have ter talk about him if she did tell it.
'Twas a fish that circled so, Turning over boldly."
But faith, if 'twas I, I should be as dry as a kex wi' travelling so far."
Presently they heard some one coming up the road whistling gaily, as though he owned the whole world and 'twas but made to whistle in.
Each marnun' 'twas quinine an' gin for all hands on an empty stomach.
'Twas from the Delphic god himself, but from His ministers) declaring he was doomed To perish by the hand of his own son, A child that should be born to him by me.