be of help to someone

• 对某人有帮助

be of help to someone的用法和样例：

例句

1. The discovery of Penicillin helped fight bacteria.
   青霉素的发现对人类抗击细菌很有帮助。
2. Bear in mind what I told you, it will help you in the future.
   牢记我跟你说过的话，它将来会对你有帮助的。