Count the words in Bai's poem and you reach exactly seventeen, the same number as the title. That may be coincidence, but it fits a poem about something small in size and large in weight. Two sentences are enough to say that a friendship has ended, and that the speaker is still struggling to say so. Its central idea is that grief can hide in grammar: the saddest part of losing a friend is the moment you must start describing them in a different tense.
The first line is four words long: "We were best friends." Every word is a single syllable, and the line has no decoration, no simile and no memory of a particular afternoon. It reads like a verdict. The key word is the small verb "were," because the loss is already complete in it. The poem doesn't announce the ending and then mourn it. The ending happens inside the first sentence, so the opening line is itself the past tense the speaker will go on to complain about. "Best" also matters. It is the language of childhood friendships, of rankings and promises, and it makes the loss sound bigger by recalling how big the friendship once felt.
The second line is a different kind of sentence. At thirteen words, it is more than three times as long as the first, and it sprawls like ordinary speech. There is no regular metre and no rhyme, and the rhythm stumbles along in a chain of short, plain words: "It's sad I have to talk about us in the pass tense now." The speaker uses no dramatic image and calls the situation simply "sad," which is understatement, and the plainness feels sincere. The phrase "I have to" suggests that the speaker feels forced into this tense, as if the language itself were insisting that the friendship is over. The poem never says why it ended, and I'd read that silence as deliberate, since the feeling is the subject and the cause is not.
The pronouns tell a small story of their own. The first line says "We." In the second, the speaker becomes "I" and the friendship becomes "us," something to be "talked about" from the outside, like an object being examined. The togetherness of "we" has split into a lone speaker and a relationship that now belongs to the past. The last word, "now," lands hard, because it quietly implies a "then" that the poem refuses to describe.
The phrase "pass tense" deserves a closer look. As printed, it reads "pass" rather than the grammatical "past," which may be a slip, but it produces a useful effect either way. "Pass" suggests passing, as in something that has gone by or been lost, and I would read that as an echo of how people speak about death. The word "tense" works doubly too: it names the grammar, but it also hints at tension, the strained feeling that often surrounds a friendship breaking down. The sounds support this. "Best," "friends" and "tense" all share the same short "e," so the lines are linked by assonance even without rhyme. The word "friends" in the first line is answered, nearly, by "tense" in the second, and the closeness of the sound makes the loss feel more bitter.
The title, "Seventeen," is never explained in the text. A reader might guess it is the speaker's age, which would place this loss at a point between childhood and adulthood, but that is an inference, not something the poem states. Because the number is left unexplained, it hangs over the two lines like a date on a photograph.
What makes the poem significant is how much it trusts its reader. It doesn't try to explain or justify the loss. It offers a flat statement and a quiet admission, and it relies on anyone who has lost a friend to supply the rest. Friendship breakups often have no ceremony and no agreed way of mourning them, and the poem's tiny size reflects that. It also shows that a poem can be moving without elaborate imagery, as long as one ordinary word, here "were," carries the whole feeling.