as expected不是从句，具体内容如下。

从句（Subordinate Clause）是复合句中不能独立成句，但具有主语部分和谓语部分，由that、who、whom，when，why，where。how，which等引导词（Connective）引导的非主句部分。包含一个限定动词,但不构成一个完整的句子的一组词,它在所属的长句中,或作为一个名词,一个副词,一个形容词,或者包含从属于它的一个或更多的从句,或被这个或这些从句所修饰,或和另一相等的从句相结合。

不是从句。例如：

1.Engineers noticed that the pipes were not expanding as expected。工程师注意到管道并没有如预期那样膨胀。

2.The Popular Front failed, as expected, to pass the 5 per cent barrier.不出所料，人民阵线没能突破5%大关。

3.As expected, it rained.果不其然下了雨。

是定语从句，只是用省略句的结构，完整的是as is expected，中文意思是不出所料；正如预期的

The country is still hopeful that it will meet its emissions goals, like reducing emissions by 40% by 2020, but the acceptance of electric cars in the country has not occurred as fast as expected.