Greta wants to become a teacher. If someone or something becomes a certain way, they start to have that quality. When did you first become interested in politics? The past tense of 'become' is became. We became good friends at once. The smell became stronger and stronger.
Word forms: becomes , becoming , became language note: The form become is used in the present tense and is the past participle. If someone or something becomes a particular thing, they start to change and develop into that thing, or start to develop the characteristics mentioned.
become /bɪˈkʌm/ vb ( -comes, -coming, -came, -come) (mainly intr) (copula) to come to be; develop or grow into: he became a monster (followed by of; usually used in a question) to fall to or be the lot (of); happen (to): what became of him? (transitive) (of clothes, etc) to enhance the appearance of (someone); suit: that dress becomes you
Also in Early Modern English, become (and certain other intransitive verbs, such as come and go) used the auxiliary be rather than have for perfect aspect constructions.
