1. It’s the first time that……….(从句中用现在完成时)
It was for the first time that………(强调句，对状语for the first time进行强调)
It’s (high) time that……..(从句中用过去时或should do)
2. It’s the same with sb. / So it is with sb.表示某人也如此（用于前句中既有肯定又有否定或两个不同类的谓语动词）
3. be about to do / be doing……when…….正要做/正在做……就在那时…….
4 A is twice / three times as +原级+as B
A is twice / three times the n. of B.
A is twice / three times +比较级+than B
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