Shift register unit and driving method thereof, and gate driving circuit, display apparatus

A shift register unit, comprising:

• an input-sub-circuit, having a first terminal connected to an input signal terminal and a second terminal connected to a terminal of a first control signal;
• a first output sub-circuit, having a first terminal connected to a third terminal of the input sub-circuit, a second terminal connected to a terminal of a second control signal, and a third terminal connected to a first output terminal;
• a phase inversion control sub-circuit, having a first terminal connected to the first output terminal, a second terminal connected to a terminal of a third control signal;
• and
• a second output sub-circuit, having a first terminal connected to the first output terminal, a second terminal connected to a third terminal of the phase inversion control sub-circuit, and a third terminal connected to a second output terminal;
• wherein the second output sub-circuit is configured that when a signal output by the first output sub-circuit changes from a valid level to an invalid level, a signal output by the second output sub-circuit changes from the invalid level to the valid level.