The 4th particle, we are going to cover today is に, to express the time when an action is taking/ has taken place.The structure of the phrase will be in this form:[time] に[action - eg: wake up]= [action eg: wake up] at [time]For example:wakes up at 8 o'clock= hachi ji ni okimasu = 八時に起きますHence,I wake up at 8 o'clock. = watashi wa hachi ji ni okimasu . = 私は八時に起きます。Other examples:When do you sleep?