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外研版（2019）英语选择性必修二《Unit 4 Breaking boundaries》Starting out & Understanding ideas优质课ppt课件
Unit 3 Breaking boundaries My 100 Days with MSF
It's exactly one month since the last reported case.
Language Focus
距离上次报告的病例已经整整过去一个月了
It is + 一段时间 + since 自从......以来已经多久了（since从句常用一般过去时）
It was + 一段时间 + since 自从......以来已经多久了（since从句常用过去完成时）
1.距离她父亲去世已经整整过去五年了
It was exactly 5 years ______________________________.
2. It is weeks since he _________(leave)home and the police are still in search of her.
3. It won't be long _________ we meet again.
4. It was at this time yesterday _______ we ran into each other.
巩固练习
since her father had died
left
before
that
But it is vital not to take any chances. So, 20 health care workers from almost as many countries, comrades in arms, raise virtual glsses to each other.
Language Focus
但是重要的是，我们不能心存侥幸。所以，我们这20位来自世界各地的医护人员，也是战友们，假装举杯，互相庆祝。