as soon as 可以放在句首吗？ as soon as 怎么用啊，词组相当于一个什么词啊，用的...

as soon as\u80fd\u5426\u7f6e\u4e8e\u53e5\u9996\uff1f

\u53ef\u4ee5\uff0c\u4e0d\u8fc7\u66f4\u591a\u65f6\u5019\u7528\u5728\u53e5\u4e2d\u3002\u4f8b\u53e5\uff1aAs soon as the food arrived he dug in hungrily.
\u98df\u7269\u4e00\u7aef\u6765\u4ed6\u4fbf\u72fc\u541e\u864e\u54bd\u5730\u5403\u8d77\u6765\u3002

\u76f8\u5f53\u4e8e immediately /instantly/directly\uff08adv\uff09\uff0c\u4e5f\u7b49\u4e8ethe minute/moment/secord\uff08\u8fde\uff09\uff0b\u53e5\u5b50\uff0c\u8fd8\u7b49\u4e8eno sooner than\uff1dhardly when\uff0c\u8fd9\u4e24\u4e2a\u7528\u7684\u65f6\u5019\u8981\u6ce8\u610f\u5426\u5b9a\u8bcd\u7f6e\u4e8e\u53e5\u9996\u8fdb\u884c\u90e8\u5206\u5012\u88c5\u4e3e\u4e2a\u6817\u5b50No sooner had i arrived home that i did my homework\u3002


\u4e3e\u4f8b\uff1a
1\u3001\u6307\u672a\u53d1\u751f\u7684\u52a8\u4f5c\uff0c\u89c4\u5f8b\u662f\uff1a\u4e3b\u53e5\u4e00\u822c\u5c06\u6765\u65f6,\u4ece\u53e5\u7528\u4e00\u822c\u73b0\u5728\u65f6\u4ee3\u66ff\u4e00\u822c\u5c06\u6765\u65f6\u3002
\u5982\uff1aI will tell him the news as soon as he comes back.
\u6ce8\uff1a\u6709\u65f6,\u4e3a\u4e86\u7279\u610f\u8868\u8fbe\u521a\u521a\u5b8c\u6210\u67d0\u4e8b\u5c31\u5982\u4f55\u5982\u4f55,\u9700\u8981\u7528\u73b0\u5728\u5b8c\u6210\u65f6\u3002
\u5982\uff1aI will go with you as soon as I have washed my face.
2\u3001\u6307\u7d27\u63a5\u7740\u53d1\u751f\u7684\u4e24\u4e2a\u77ed\u52a8\u4f5c\uff0c\u4e3b\u4ece\u53e5\u90fd\u7528\u4e00\u822c\u8fc7\u53bb\u65f6\u3002
\u5982 He took out his English books as soon as he sat down.
\u4e0d\u8fc7\uff0c\u6211\u4e5f\u89c1\u8fc7\u4ece\u53e5\u548c\u4e3b\u53e5\u90fd\u7528\u4e00\u822c\u73b0\u5728\u65f6\u7684\u60c5\u51b5\u3002
\u5982\uff1aAs soon as he finishes his classwork, he runs out of the class.\u4ed6\u4e00\u505a\u5b8c\u8bfe\u5802\u4f5c\u4e1a\uff0c\u5c31\u8dd1\u51fa\u4e86\u6559\u5ba4\u3002

能, 加个逗号.
从句在前的话，一般用逗号与主句分开。

可以
as soon as:

conj. 一...就
一般用逗号与主句分开

As soon as his father went out, the boy ran to the cinema.
爸爸刚出门, 那男孩就跑向电影院。

可以提前 提前的话不用加逗号

不能

can``

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