一直弄不清楚比如Do you happen to know what size shoes he wears?中 what 充当从句的什么语?还有We gave him what help we could.what 的位置用that 可以吗?what充当什么语?谁能帮忙分析下。我的what that一般都能分得清填什么。但是到上面那种句子里就觉得填that 谁可以指导下。谢谢
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