在英语中，如果你想表达“有事需要帮忙”，可以使用以下几种说法：

"I have something I need help with."

"There's something I could use your help on."

"I've got a matter that requires assistance."

"I could use a hand with something."

"I have an issue where I might need your help."

"I'm in need of some assistance regarding something."

这些表达都可以根据具体情境和语境进行适当调整。比如，如果是在正式场合或写信时，可能更倾向于使用第一种或第三种表达；而在非正式或口头交流中，第四种或第五种表达更为常见。