“加以监护”可以翻译为 “place under supervision” 或 “provide supervision for”。
“place under supervision” 强调将某人或某物置于被监护的状态。
“provide supervision for” 更侧重于说明为某人或某事提供监护的行为。
具体使用哪个表达，可根据语境和表达习惯来选择。例如：
The court decided to place the minor under supervision until he reached the age of majority. （法院决定对该未成年人加以监护，直至他成年。）
Parents are responsible for providing supervision for their young children. （父母有责任对年幼的孩子加以监护。）