a) yeshthere is and enthere is not
b) the verb to have
c) the dative, formed with the preposition le-to
d) more verbs
e) more prepositions
f) the merging of prepositions and personal pronouns (eg because of him, after you)
g) interrogative sentences without question word begin with ha-im

The verb „to have“ in Hebrew is formed with the word yesh / there is, the expression doesn’t have or don’t have with the word en / there is not, both followed by dative.

I have thus is translated as there is to me, yesh li, I don’t have as there is not to me, en li.

Examples:

I don’t feel likeאין לי חשקWhat do you have??מה יש לך
(there is no desire to me)en li cheshek(what is there to you?)mah yesh lechah
They don’t have time.אין להם זמןwe are lucky.יש לנו מזל
(there is no time to them)en lahem zman(there is luck to us)ješ lanu mazal

My hat has got three corners
http://www.flix.co.il/tapuz/showVideo.asp?m=2074059
לכובע שלי שלוש פינות
(to my hat there are three corners)la-kova sheli shalosh pinot