New York City has been placed in a state of emergency2 Mayor Bill de Blasio announced Saturday1 as storm preparations grew more urgent3 as the newly upgraded Hurricane Henri closed in on the northeastern United States4.

长难句解析

1主句：主谓宾结构；

2宾语从句：跟在及物动词“announced”之后，省略了引导词that，正序语序为“Blasio announced New York City...state of emergency”；

3介词短语作状语：as在这里作介词，意为“当...时”；

4原因状语从句：as在这里作连词，意为“因为，由于”。

重点词汇词组

1.be placed in 被放置在

The money will be placed in a trust fund for her daughter.

这笔钱将投入到为她女儿设立的信托基金里。

2.close in on 包围；迫近；逐渐接近

Hitler himself committed suicide as Soviet forces were closing in on Berlin.

当苏联军队包围柏林时，希特勒自杀了。

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