There cometh (erchetai). Vivid historical present as in Joh 4:5.
A woman of Samaria (gunē ek tēs Samarias). The country, not the city which was two hours away.
To draw water (antlēsai hudōr). First aorist active infinitive of purpose of antleō for which see Joh 2:8. Cf. Rebecca in Gen 24:11, Gen 24:17.
Give me to drink (dos moi pein). Second aorist active imperative of didōmi and second aorist active infinitive (object of dos) of pinō, shortened form of piein. A polite request.