这是CNN新闻中的一段，应该是of后接了从句的用法。全文省略之前应该是这样：
warned his Chinese counterpart of (that)"potential implications and consequences" for China should support for Russia (should) be forthcoming。其中should是受前面的should的影响而省略的。
去掉旁枝末节后会清晰些：
warned his Chinese counterpart of that "potential implications and consequences" should be forthcoming。

说话人是强调，China一定要支持Russia的话，那"potential implications and consequences"就一定会，并正要发生(should be forthcoming)。

【 在 dbry 的大作中提到: 】
: [upload=1][/upload]
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