It

Pronome

  would

Auxiliar

  have

Auxiliar

  been

Auxiliar

  visible

Adxectivo

  to

Adposición

  me

Pronome

,  had

Auxiliar

  I

Pronome

  only

Adverbio

  looked up

  as

Conxunción subordinante

  it

Pronome

  passed

Verbo

.

It would have been visible to me, had I only looked up as it passed.

It would have been visible to me, had I only looked up as it passed.