Purpose: This study examines whether differences in acquisition exist among the inflectional constructions of number, gender, possessive pronouns, and tense. Moreover, the study investigates whether these inflectional patterns develop with age. Method: The participants were 1,020 Arabic-speaking kindergartners from K2 and K3. Children were assessed in morphological tasks, which targeted four different morphological inflectional constructions both in real words and pseudowords: gender, number-plural, possessive pronouns, and tense. Results: Findings reveal the differences between all inflectional constructions. In other words, children demonstrated higher performance in gender construction, followed by construction of numbers and possessive pronouns, while the lowest performance is shown among tense construction. In addition, the results indicate that all inflectional constructions develop with age, that is, there was higher performance in K3 than in K2 in all inflection constructions. Conclusions: This study contributes to our knowledge about early language development by showing that the acquisition of gender and number-plurals is faster and more advanced than the acquisition of possessive pronouns or tense. The implications of these results are discussed, especially the need to develop children's inflectional forms such as possessive pronouns and tense, which may eventually also impact narrative understanding and production.