at the time or in the event that. when the noise stops. at any time; whenever. He is impatient when he is kept waiting. upon or after which; and then. We had just fallen asleep when the bell rang. while on the contrary; considering that; whereas. Why are you here when you should be in school? what time. Till when is the store open? which time., 1. at what time or period? how long ago? how soon?: When are they to arrive? When did the Roman Empire exist?, “ When ” is the noun, it is a particular period of life and is the doer of an action- it “troubled” the subject “He.” a. the time in which something is done or comes about. The confusion is over the when of the statement. The word “when” has multiple functions. It can be used as an adverb, conjunction, pronoun, and noun., We use when to refer to the time of a future situation or condition that we are certain of: … In informal language, we often use where, when or why to introduce defining relative clauses instead of at which, on which or for which. … When is a wh-word. We use when to ask questions, as a conjunction and to introduce relative clauses. …, What is the summer solstice? The summer solstice marks the beginning of summer in the Northern Hemisphere and the longest day of the year. Meanwhile, the Southern Hemisphere will greet winter with , Learn about time adverbials like at seven o'clock, in 1998, last Saturday and in five minutes and do the exercises to practise using them..