當(dāng)然是 it was ；
than 在這里是連詞,后面接 it was reported that there were ... ；
其實(shí)這一句的意思也可以這樣表達(dá)：It was reported that there were some casulties, but actually there were more.；
what 在作為關(guān)系代詞引導(dǎo)定語(yǔ)從句時(shí),相當(dāng)于“先行詞 + 關(guān)系代詞”；
在這一句當(dāng)中,因?yàn)榍懊娴?casuslties 是復(fù)數(shù),what 則相當(dāng)于 those which / that ,根據(jù)主謂語(yǔ)一致的原則,原句應(yīng)為：there were more casualties than were reported；
句子的意思是：傷亡人員比報(bào)道的要多.也就是說(shuō)，如果原句是there were more casualties than were reported，那么此處就用what？即該用what還是it僅僅靠was和were來(lái)判斷即可？？？對(duì)，在這一句，是這樣的。那這2句：There were more casualties than what were reported.There were more casualties than it was reported there were.完全等價(jià)？注意，是完全？若不完全，有何本質(zhì)上的區(qū)別？謝謝！這兩句話(huà)在意思上沒(méi)有什么大的不同，但在語(yǔ)法上，結(jié)構(gòu)是不一樣的； There were more casualties than what were reported = There were more casualties than those which were reported ； those which were reported = the casualties which were reported = 報(bào)道的傷亡人員； the casaulties 在這里是先行詞，定語(yǔ)從句中的主語(yǔ)，也就是關(guān)系代詞 which 在數(shù)上面應(yīng)該要與它一致，所以用 were；it was reported there were = it was reported that there were some casaulties = 據(jù)報(bào)道，有一些傷亡人員； 這里的 it 是形式主語(yǔ)，后面的 that 從句是真正的主語(yǔ)；it 做主語(yǔ)，應(yīng)該用 was 。