Hi Hiba,

Some grammar guides will tell you that "shall" is used with the first person pronoun "I" (e.g. I shall mow the lawn this weekend.) while "will" is used with second and third person pronouns "you", "he", "she", "they", "it" (e.g. You will mow the lawn next week.)

Such a distinction is pretty much gone, and "will" can be used with all pronouns to describe a future action (e.g. I will think about the matter. / We will go to the concert. / They will revert to us within three days.)

Some Uses of Will

1. "Will" is used to form the future tense. (e.g. I will go to the supermarket. --> quick decision; happening soon)

2. "Will" is used to describe something with certainty. (e.g. Oil will float on water. --> the density of oil is definitely lower than that of water)

Some Uses of Shall

1. "Shall" is still found in legal documents to describe legal obligations. (e.g. We shall, at our sole discretion, be entitled to review the Facility at any time and from time to time and to decide whether the Facility shall be cancelled, reduced or repaid.)

2. "Shall" is used to state an order. (e.g. All payments shall be made in cash.)

3. "Shall" is used as a suggestion. (e.g. What shall we have for dinner?)

I hope this helps.