Research studies indicate that although phrasal verbs are fairly well established in hearing children at three and four years of age (Fischer, 1972), many deaf children as old as 18 and 19 still have ...

A phrasal verb is a verb that is combined with a preposition (e.g. in, on, with) or an adverbial particle (e.g. up, out, off) The preposition or adverbial particle extend the meaning of the verb ...

Here, the phrasal verb keeps on means continues. It has the same meaning as keeps but is slightly stronger. Other phrasal verbs that extend the meaning of the main verb are hurry up and sit down.