强调句与 it 句型：It is … that

It is not by chance that the Funeral March is not the last movement of the Eroica Symphony, but the second, so that suffering does not have the last word.

主干the Funeral March is not the last movement of the Eroica Symphony, but the second, so that suffering does not have the last word

葬礼进行曲不是英雄交响曲的最后一个乐章而是第二个，这并非偶然，因此苦难并没有占据最后的主导地位。

看点强调句。去掉It is和that后，not by chance还原至句末，主干逻辑完整，强调的是方式状语not by chance。

It is unarguable that our laboratories, scientific instruments, rockets and satellites — the tools we scientists need to measure the planet’s pulse — demand significant amounts of energy both in their construction and operation.

主干It is unarguable that our laboratories, scientific instruments, rockets and satellites demand significant amounts of energy

不可否认的是，我们的实验室、科学仪器、火箭和卫星——我们科学家用来测量地球脉搏的工具——在建造和运行过程中都需要消耗大量能源。

看点形式主语。去掉It is和that后，unarguable直接接主语从句，语法不成立，that后为真正主语。

“It was a really bad move because that’s not my passion,” says Ning, whose dilemma about the job translated, predictably, into a lack of sales.

主干It was a really bad move

“这真是个糟糕的决定，因为那不是我的热情所在，”宁说，他对工作的困境不出所料地转化为了销售业绩的下滑。

看点人称代词。It指代上文的具体决定，that引导原因状语从句，均非强调句或形式主语结构。

It is __18__ that around 12,000 to 15,000 caravanserais were built along the Silk Road, __19__ only about 3,000 are known to remain today, many of which are in __20__.

主干It is __18__ that around 12,000 to 15,000 caravanserais were built along the Silk Road

据估计，丝绸之路沿线建造了约1.2万至1.5万个商队客栈，而如今已知仅存约3000个，其中许多处于残破状态。

看点形式主语。空格处填入estimated等形容词，去掉It is和that后结构崩塌，that后为真正主语从句。

It is not that pink is intrinsically bad, but it is such a tiny slice of the rainbow and, though it may celebrate girlhood in one way, it also repeatedly and firmly fuses girls' identity to appearance.

主干It is not that pink is intrinsically bad, but it is such a tiny slice of the rainbow

这并不是因为粉色本身不好，而是因为它只是彩虹中极小的一部分，尽管它可能在某种程度上赞颂了少女时代，但它也反复且坚定地将女孩的身份与外表融合在一起。

看点固定句型。It is not that... but (it is)...表“不是因为...而是因为...”，that引导原因状语从句，不可剥离。

It is curious that Stephen Koziatek feels almost as though he has to justify his efforts to give his students a better future.

主干It is curious that Stephen Koziatek feels almost as though he has to justify his efforts

令人好奇的是，斯蒂芬·科齐亚特克几乎觉得他必须为自己给学生创造更好未来的努力进行辩护。

看点形式主语。去掉It is和that后，curious直接接人名，语法破裂，that后为主语从句，it作形式主语。