Difference between should and shall

[sofia]

Test No. incompl/elem-17 "White Water Rafting", question 5

Are you really suggesting that we ......... actually get into one of those ridiculous things?

(a) shall
(b) will
(c) should

Test No. incompl/elem-17 "White Water Rafting", answer 5

Are you really suggesting that we should actually get into one of those ridiculous things?

Correct answer: (c) should

Your answer was: incorrect
Are you really suggesting that we shall actually get into one of those ridiculous things?
_________________________

why is it should and not shall?
thank you

[Torsten]

Should expresses a recommendation while shall expresses an action that will take place in the future.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Abecedarian]

[Torsten]

Let's take a look at the situation. One person is expressing their disbelief by saying: Are you really suggesting that we should actually get into one of those ridiculous things? This means, the second person has said that it might be a good idea to take a specific action. That's why should is used instead of shall or will.
Do you really mean we will get into one of those ridiculous things? means that one person has said that something will happen instead of suggesting an action.
_________________
Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Abecedarian]

[Torsten]

Dear Abecedarian,

You got that right.
_________________
Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Nageen]

Please Mr.Torsten explain it that

Is should used as a past form of shall? If so in what coditions ?
I have heard that the past form of will or shall is would. But some teachers say that tha past form of
shall is should.

[Nathanael86]

Hey,

what about a sentence like: "Let's have a drink. Shall we?" Isn't that rather a suggestion than a action definitely going to take place?