This is the 9th most frequent Vietnamese word.
sẽ
"Will" (used to indicate future tense).
In this sentence, 'sẽ' indicates a future action, showing an intention or plan to perform the action 'đi đến trường' (go to school).
Tôi sẽ đi đến trường vào ngày mai.
I will go to school tomorrow.
Here, 'sẽ' is used to denote a future outcome or consequence based on the conditional provided by the previous clause.
Nếu bạn học chăm chỉ, bạn sẽ đạt được kết quả tốt.
If you study hard, you will achieve good results.
In this context, 'sẽ' serves the function of predicting a future event or occurrence, specifically the weather being rainy.