Выбрать существительное в общем или притяжательном падеже в зависимости от смысла (Jane, Jane's) chiidren get up at seven o'clock.

Jane's children get up at seven o'clock. (Possessive case) - Дети Джейн встают в семь часов.

The children of Jane get up at seven o'clock. (Common case).

Do Jane's children get up at seven o'clock? (General question).

Who gets up at seven o'clock? (Special question).

When do Jane's children get up? (Special question).

Do Jane's children or does Tom's son get up at seven o'clock? (Alternative question).

Do Jane's children get up or sleep at seven o'clock? (Alternative question).

Do Jane's children get up at seven or at ten o'clock? (Alternative question).

Jane's children get up at seven o'clock, do not they? (Disjunctive question).