Whereas the G20 summit in London earlier this month kept its focus on global financial and economic matters, discussions at the Summit of the Americas could be sidetracked by advocacy on behalf of a nation not present at the gathering:Cuba.

VOA: standard.2009.04.15

So can be changed slightly, depending on tense, past, present or future as well as whether or not you want to ask a question.

因此这个句型要根据不同的时态，如过去时、现在时和将来时，作出一点调整；另外也会根据是否是问句而略有不同。

There is 课堂 - SpeakingMax英语口语达人

because that sarcastic undertone may or may not be present depending on how it's used.

因为话中是否有挖苦的意思，还得看这句型是如何使用的。

Do you ever课堂 - SpeakingMax英语口语达人