要根据具体情况而定,一般来讲是不可以的,但也有特殊的例子。
一般不可以:I don't eat meat, because I hate the taste of it. 我不吃肉是因为味道不好。(一般来讲because是用来解释句子使句子表达完整的。)
特殊的:Because of his passion for swimming, he joined a swimming team when he was 15 years old. 由于他对游泳的激情,他在15岁时加入了一个游泳队。 (这里的because在句首,前面可以是任何句子,但其实because前面的句子可以和本句没有任何关系。说because前面加句号是牵强的说法。)