* "shall" can be used only with "I" and "we".
* It is possible to use "shall" to mean "will" with "I" and "we".
* But in everyday English we only use "shall" in the following situations:
1. to offer something.
Shall I help you?
Shall I open the window?
2. to suggest something (Shall we = let’s/why don't we).
Shall we play tennis?
= Let’s play tennis.
= Why don’t we play tennis?
3. to ask for advice.
What shall I do?
* Short forms:
shall = 'll
shall not = shan't