怎么变否定句Thestudentshadaterribleschooltrip.TheysawanoctopusintheVisitors'Center.Theytookthesubwaybacktoschool.thestudentsamovieaboutdolphins.Thescienceteachercleanedthebus.这5句话变下否定句`然后在变一

Question

怎么变否定句
The students had a terrible school trip.
They saw an octopus in the Visitors'Center.
They took the subway back to school.
the students a movie about dolphins.
The science teacher cleaned the bus.
这5句话变下否定句`然后在变一般疑问句`及否定,肯定回答`谢谢了
啊``抱歉``第4句是The students watched a movie about dolphins.

Answer 1

The students had a terrible school trip.
The students had not a terrible school trip.
Did the students have a terrible school trip?
Yes,they did/No,they did not.
They saw an octopus in the Visitors'Center.
They did not saw an octopus in the Visitors'Center.
Did they see an octopus in the Visitors'Center?
Yes,they did/No,they did not.
They took the subway back to school.
They did not take the subway back to school.
Did they take the subway back to school?
Yes,they did/No,they did not.
第四句您给句子不全 无法回答
The science teacher cleaned the bus.
The science teacher did not clean the bus.
Did the science teacher clean the bus?
Yes,he did/No,he did not.