Yes, you say "I don't think it is the case.", rather than "I think it is not the case.", if you think something is not the case.
That is, if 'think', 'suppose', 'believe' or 'imagine' is used to introduce a negative idea, you say 'I don't think...', 'I don't suppose...', etc. The usage is called 'transferred negation'.
You also say 'I don't think so.', 'I don't suppose so.', etc - in a negative 'short answer' structure.
The word 'hope', on the other hand, is an exception, for example, you say 'I hope they won't come.', not 'I don't hope they will come.'
So, you can try to make some sentences by using this structure - you can say "I don't think Expector knows all the grammar rules.", but not "I think Expector doesn't know all the grammar rules."
Hope it helps!
Comments
Thanks, Komala!
You're welcome, Daniel!
Thanks for such a wonderful information about English usage Expector.
Hi Afro,
In fact, yesterday I was so upset when China's national football team lost again - words fail me!
By the way, you should have used 'present perfect tense' in the second sentence - 'what has happened' rather than 'what had happened'.
Thanks!
I don't know whether she came home yesterday. But, I hope she will not be upset to find out what had happened during her absence!
@Rajib
Thanks for making the sentences. All the sentences are grammatically correct except for #2 "I don't suppose to be looser."
I assume you mean "I don't suppose him/her to be a looser." or "I'm not supposed to be a looser."
@Adaline
Great! You used the structure corretly.
@Serene
You, too, used the structure correctly - it seems there are some typos in some of the sentences: 'be afraid to do something', 'if we set our goal...'
Keep it up!
Expector Smith
It is very effective. I have made some sentences what is given bellow:
1. I don't think that I will be loosing continuously.
2. I don't suppose to be looser.
3. I hope the storm will not come again.
Thanks a lot
@usra
Thanks for being the first to add a comment here. Let's work on this sentence:"I supposed him a good person, but he was opposite of it.". Tips: you can say 'suppose someone to be something', not 'suppose someone something'. So, the sentence can be corrected this way: "I supposed him to be a good person, but he was the opposite of it."
@Shoba
Great! You used the structure correctly!
@LUCI
Wow, I really enjoyed reading your sentences, even though I don't sleepwalk or talk in my sleep:)
@setareh
You used the structure correctly, too. Keep it up!
I hope Sir Expector will teach us all the grammar rules that he knows.
I hope she doesn't get angry when she hears this.
I don't think I will pass my exams if I sit in front of my laptop all day long.
Thank you for this lesson, Sir Expector. I don't think I have heard about transferred negation before. :)