see with/ have/keep half an eye

sledovat

Then he climbed into the Land Rover beside his two passengers and drove off fast, with the aim of abandoning Jamie to the custody of his aunt as quickly as possible. He could see with half an eye that the kid’s aunt was going to be one of the confident, bossy, well-connected women.

I don’t think anyone but me was taking notes at this stage of the proceedings. Of course Madame keeping an eye on O was nothing new. She always had half an eye for him; sometimes I thought she watched him as a tamer does a tiger.

So when the class reassembled, Matilda went to her desk and began to study a text-book on geometry which Miss Honey had given her. The teacher kept half an eye on her all the time and noticed that the child very soon became deeply absorbed in the book.

(BNC-B)

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