The cups can break be careful. (to break)
Put the verb in brackets into the correct form. (Поставь глагол в скобках в нужную форму.)

The cups can break,be careful.

"The cups can break, so be careful." (to break)

In this sentence, we need to put the verb "to break" into the correct form. The given verb is "break" in its base form.

The sentence already includes the auxiliary verb "can," which indicates the ability or possibility to break. Therefore, we need to use the base form of the verb "break" after "can" to form the correct sentence.

In summary, the correct form of the verb "to break" is the base form, which is "break." So the complete and correct sentence is: "The cups can break, so be careful."