Việtnamese kind of analytic you say (i'm using literal meaning): <br>Tôi ăn = I (am) eat<br>Tôi đang ăn = I (am) eat-ing<br>Tôi đã ăn = I w(as) eat<br>Tôi sẽ ăn = I w(ill) eat<br>Chúng tôi đang ăn = We (are) eat-ing<br>Chúng tôi đã ăn = We w(ere) eat(en)<br>Btw, Vietnamese don't need tense to perform the meaning of the words