Verb plain form + のを忘れる/知る

[Forget/Know That ~]

Connection: Verb plain form + のを + 忘れる/知る/覚える/思い出す

Used with cognitive verbs to express forgetting, knowing, remembering, or recalling an action. The の nominalizes the verb clause as the object of the cognitive verb.

Formation: Verb plain form + のを + cognitive verb

• 持ってくるのを忘れた (forgot to bring)
• 来るのを知っていた (knew [he] was coming)

Common Cognitive Verbs:

• 忘れる (forget to ~)
• 知る (know that ~)
• 知っている (know/be aware that ~)
• 覚える (remember to ~)
• 覚えている (remember that ~)
• 思い出す (recall/remember that ~)

Usage Notes:

• Use の (not こと) with these verbs when referring to specific actions
• The subject of the subordinate clause is marked with が
• Common pattern: [action]のを忘れる = forget to do [action]

Pattern Structure: [Someone]が [Verb]のを + 忘れる/知る/etc.

Examples: 鍵を持ってくるのを忘れた。(I forgot to bring the key.) 彼が明日来るのを知っていますか。(Do you know that he's coming tomorrow?) 宿題を出すのを忘れないでください。(Please don't forget to submit your homework.)