Put the verbs in brackets into the Past Perfect, the Past Perfect Continuous, the Past Simple, or the Past Continuous.

1) happened, 2) was walking, 3) spotted, 4) started, 5) turned, 6) grabbed, 7) was trying, 8) took, 9) saw, 10) knew, 11) found, 12) went, 13) examined, 14) announced, 15) had been waiting, 16) came, 17) dug, 18) did not find, 19) came.