Поставьте предложения в Present Continuous 1.It rain) now. 2.Boris (wash) his hands at the moment. 3.Polly,hello!What (you\do) here in Moscow?

It is raining now.
Формула Present Continuous: am/is/are + глагол с окончанием -ing.

• Подлежащее: It

• Вспомогательный глагол: is

• Глагол: rain → raining
  Получаем: It is raining now.

Boris is washing his hands at the moment.

• Подлежащее: Boris (как he)

• Вспомогательный глагол: is

• Глагол: wash → washing
  Получаем: Boris is washing his hands at the moment.

Polly, hello! What are you doing here in Moscow?
Вопрос в Present Continuous строится так: (вопросительное слово) + am/is/are + подлежащее + глагол-ing.

• Вопросительное слово: What

• Подлежащее: you

• Вспомогательный глагол: are

• Глагол: do → doing
  Получаем: Polly, hello! What are you doing here in Moscow?