将下列陈述句改写为否定句,并就对划线部分进行提问.1.Youmustpickthestrawberriesinthegarden(划线部分：inthegarden)2.Markmusttaketheumbrellawithhim.(划线部分：Mark)3.Youmustgooutateighto'clock.(划线

Question

将下列陈述句改写为否定句,并就对划线部分进行提问.
1.You must pick the strawberries in the garden(划线部分：in the garden)
2.Mark must take the umbrella with him.(划线部分：Mark)
3.You must go out at eight o'clock.(划线部分：eight o' clock)
4.You must open the door at night(划线部分：open the door)

Answer 1

You mustn't pick the strawberries in the garden.
Where must you pick the strawberries?
Mark needn't take the umbrella with him.
Who must take the umbrella with him?
You mustn't go out at eight o'clock.
What time must you go out?
You mustn't open the door at night.
What must you do at night?
must是情态动词,只有一种形式,表示必须,它的过去式和现在式（原形）同型,没有分词形式.希望我能帮助你解疑释惑.