Ⅰ.also较正式,位置通常靠近动词,用于句中;且用于肯定句中。如:①He also plays football.他也踢足球。②I was also there.我也在那儿。Ⅱ.too多用于口语,通常置于句末,前边须用逗号隔开,也可用于句中,且前后均须用逗号隔开,用于肯定句中。如:①He is a worker,too.他也是名工人。②The two cows,too,are white.那两头奶牛也全都是白的。 I.also is more formal than usual, and the position is usually close to the verb, used in the sentence; and used in the affirmative sentence. He also plays football. I was there too. II.too Used for speaking, usually placed at the end of the sentence, the front to be separated by commas, can also be used in the sentence, and before and after must be separated by commas, for positive sentences. Such as: He is a worker, too. He is also a worker. ② The two cows, too, are white. The two cows are all white.