ai shite imasu is
Japanese for
I love you.
The Japanese language instruction books I can lay my hands on tell me to pronounce it
eye-she-te-ee-ma-sue
but in real life it's pronounced
eye-shtay-mas
remember that, in both cases, no syllable gets much more stress than any other.
In Hiragana it would be
あい して います
In Katakana it would be
アイ シテ イマス
According to dido, in Kanji it would be
愛して居ます