1_ if you donnot understand you (can/should) ask your teacher. That is my advice.
You (can/could) buy almost anything online these days.
If you donot understand you (can/should) ask your teacher. Thats my advice.

في اسئلة تانية صعبة في الورك بوك سوف اكتبها لاحقا وارجو الاجابة عليها ويا ريت مع توضيح سبب الاجابة
وشكرا

1- if you do not understand you (can/should) ask your teacher. That is my advice.
لانها تعبر عن نصيحة Expressing a piece of advice

2- You (can/could) buy almost anything online these days.
التعبير عن قدرة فى المضارع Expressing a present ability

thaaaaaaaaaanx

الف شكر معلومة جميله