Напишите во и отрицание к предложениям:
a).You see the charm of Oxford in the green fields and parks, in the river Thames and its streams which pass near the city.
b). Do you now that the name Oxford means the part of the river Thames where the oxen forded.

a?) Do you see the charm of Oxford in the green fields and parks, in the river Thames and its streams which pass near the city?

a-) You don't see the charm of Oxford in the green fields and parks, in the river Thames and its streams which pass near the city.

b?) Do you now that the name Oxford means the part of the river Thames where the oxen forded? (Тут как не странно, сразу образованна вопросительная форма)

b-) You don't  that the name Oxford means the part of the river Thames where the oxen forded now.

Как-то так, надеюсь