'Shall' is a modal auxiliary. These verbs don't work in the same way as standard verbs.
Here's how to conjugate 'shall':
Indicatif
Simple present
- I shall conjugate
- you shall conjugate
- he shall conjugate
- she shall conjugate
- it shall conjugate
- we shall conjugate
- you shall conjugate
- they shall conjugate
Present continuous
- I shall be conjugating
- you shall be conjugating
- he shall be conjugating
- she shall be conjugating
- it shall be conjugating
- we shall be conjugating
- you shall be conjugating
- they shall be conjugating
Past perfect
- I shall have conjugated
- you shall have conjugated
- he shall have conjugated
- she shall have conjugated
- it shall have conjugated
- we shall have conjugated
- you shall have conjugated
- they shall have conjugated
Perfect Continuous
- I shall have been conjugating
- you shall have been conjugating
- he shall have been conjugating
- she shall have been conjugating
- it shall have been conjugating
- we shall have been conjugating
- you shall have been conjugating
- they shall have been conjugating