他們似乎很快樂不是嗎？

They seem to be happy, don't they?

Source: Tatoeba

Sentence Composition

1 他們 tāmen they; them
2 似乎 sìhū it seems; seemingly; as if
3 很 hěn
  1. very; quite
  2. (also, often used before an adjective without intensifying its meaning, i.e. as a meaningless syntactic element)
4 快樂 kuàilè happy; joyful
5 不是嗎 bùshìma isn't that so?