I think english is important 改成疑问句和否定句怎么变?I think

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Is English important?
I don't think English is important.
Does Tom enjoy his life every day?
Tom doesn't enjoy his life every day.
Do they fly to London every week?
They don't fly to London every week.
Did i do my homework last night?
I didn't do my homework last night.
Did we draw a lot of pictures yesterday?
We didn't draw a lot of pictures yesterday.
======以下答案可供参考======
供参考答案1:
do I think English is important
does tom enjoy his life every day
do they fly to London every week
did I do do your home work
did we draw a lot of pictures yesterday
供参考答案2:
I think English is important
疑问：Do you think English is important ?.否定：I don't think English is important .否定：Tom doesn't enjoy his life every day.疑问：Does Tom enjoy his life every day?
They don't fly to London every week。 Are they fly to London every week?
I didn't my homework last night .Did you do your homework last night ?
We didn't draw a lot of pictures yesterday . Did we draw a lot of pictures yesterday ?