How do you plan to solve it?
module t_ff_async_pr ( input CLK, input RST, input PRE, input T, output reg Q ); // Write your code here always @ (posedge CLK or posedge RST or posedge PRE) begin if(RST) Q <=0; else if(PRE) Q <=1; else Q <= T?~Q:Q; end endmodule