Several recent reports on the untutored second language acquisition of English have suggested that the same developmental sequence holds for the acquisition of the interrogative structures irrespective of whether English is acquired as a first language (L1) or a second language (L2). These studies have been conducted within the Klima & Bellugi (1966) framework worked out for the L1 acquistion of English. New data from four children with German as L1 and acquiring English as L2 naturalistically, i.e., without being tutored, indicate that these results do not hold for every combination in which English is acquired as L2. Furthermore, if the data from the earlier reports are re-analyzed within a more detailed framework than the Klima & Bellugi one, then differences comparable to those found for L2 English/L1 German become apparent. It is concluded that: (1) the L1 acquisition of English questions is different from the L2 acquisition, and (2) the L2 developmental sequences for any language vary systematically as a function of the L1 acquired previously. (Author/CFM)