Identifying written questions in Hebrew is relatively simple as there are several common interrogative words that are used to begin questioning sentences. These are as follows:
מִי Who
מָה What
מָתַי When
אֵיפֹה / אֵי Where
לָמָּה Why
אֵיךְ How
Another way that question can be formed is by adding Hey as a prefix to a term or phrase, known in this case as an 'interrogative hey'. Hence, a phrase like יְדַעְתֶּם can be turned into a question by adding ה at the beginning, so now you have 'do you know?'.