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==1'b1) Q<=1'b0; else if(PRE==1'b1) Q<=1'b1; else Q<=T^Q; end endmodule