“忘掉不好的事”的英文表达可以是 "forget about the bad things" 或 "put the bad things behind you." 这两个表达的来源都源于人们常常把不愉快的事情放在背后，以便不再担心或让它影响当前的心情。例句如下：

"I know you're upset about what happened at work, but try to forget about it and enjoy the weekend."（我知道你为工作中发生的事感到不高兴，但试着忘掉它，享受这个周末吧。）
"After the breakup, she tried to put the bad things behind her and focus on building a new pfe for herself."（分手后，她试图忘掉不好的事，专注于为自己打造一个新生活。）
"Sometimes it's better to just forget about the things that make you unhappy and move on."（有时候，忘掉让你不快乐的事情并继续前进会更好。）