Преобразуйте следующие предложения в вопросительную и отрицательную форму: 1. an analog computer is a device. 2. the digital computer differs from the analogue computer. 3. the first man -made digital computer was probably the abacus. 4. the human operators are replaced by automatic devices. 5. store memorizes numbers and instructions.

1. Is an analog computer a device?
    An analog computer isn't (is not) a device.
2. Do the digital computer differ from the analogue computer?
    The digital computer don't differ from the analogue computer. 
3. Did the first man-made digital computer was probably the abacus?
    The first man-made digital computer wasn't (was not) probably yhe abacus.
4. Are the human operators replaced by automatic devices?
    The human operators aren't (are not) replaced by automatic devices.
5. Does store memorize numbers and instructions?
    Store doesn't (does not) memorize numbers and instructions.