Breakdown of شما باید مواظب باشید، وسایل سنگین هستند.
شما
you (plural)
بودنbudan
to be
سنگینsangin
heavy
بایدbâyad
must
مواظب بودنmovâzeb budan
to be careful
وسایلvasâyel
things
Questions & Answers about شما باید مواظب باشید، وسایل سنگین هستند.
Why is the verb for "to be" باشید instead of هستید?
Because of the word باید (must). After باید, the main verb has to be in a special form called the subjunctive. For most verbs, we make this form by adding a بـ prefix, but the verb "to be" has a special subjunctive stem: باش (bâsh). We just add the "you" ending ـید (-id) to get باشید.
Does باید change depending on who we are talking to?
No, it stays exactly the same! باید is an "impersonal" verb, which means it doesn't take different endings for "I", "you", "we", etc. It is always the second verb—in this case, باشید—that changes to match the subject شما (you).
Why do we use the normal verb هستند in the second half of the sentence?
The second part of the sentence ("the things are heavy") is just stating a simple fact. The "must" from باید only applies to the first part of the sentence ("you must be careful"). Because the second part isn't something that "must" happen, we go back to using the normal present tense verb هستند (are).
The word for "things" is وسایل. Is this a plural word?
Yes, وسایل (vasâyel) is the plural form of وسیله (vasileh), which means a thing, tool, or piece of equipment. Because it is a plural subject, it matches perfectly with the plural verb هستند.
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