could have sworn

I don't speak the language of cats, but I could have sworn that she was asking me for some milk!

Obi-Wan felt as if his throat had been squeezed. His feet were planted on the floor, or else he could have sworn that he staggered.

Though the question was clearly meant for me, he was glaring at Edward now, and I could have sworn I saw his hand twitch toward the gun.

As Gatsby closed the door of "the Merton College Library. " I could have sworn I heard the owl-eyed man break into ghostly laughter.

Oh, alright. But I could have sworn I felt a fish nibbling on my line! Here, take my rod . Try you hand at bringing a fish in.

The woman in the passenger seat thought to herself, "I must be losing it, I could have sworn we just went through a red light. "

I could have sworn that there was somebody in the next room.

I could have sworn several people behind us were walking close enough to eavesdrop.

I could have sworn I heard a knock at the door.

At that moment, she could have sworn he was dying. Now, he looked to be merely sleeping.

I could have sworn you were getting ideas.

Y: I could have sworn that I heard a strange tapping sound in my house last night.

Could have sworn I walked past William Jefferson Clinton betting it all on Red.

I could have sworn that I saw it hit the sideline.

I could have sworn I was going to have a handsome lump on my forehead, but we passed through the walls - like ghosts!

I could have sworn that I saw him coming at.

I could have sworn I heard voices saying, 'Isn't he cute?

I could have sworn it was your watch that was slow.