Добрый день.

1. bud when captured or placed under stress they struggle, and then become calm as if they are half asleep

Герундий: captured, placed, struggling

Инфинитив: to become, to be,  to sleep

2. what made  the film remarkable was the it didn't use any stand - ins or special effects

Герундий: using ,stand - ins

Инфинитив : to use

3. during the first take , the shark escaped - much to Cove's relief

Герундий : escaping

Инфинитив : to escape

4. cove has seen shars  take bait such as chichen or lobster info their mouth, taste it then spit it out

Герундий: taking, tasting

Инфинитив : to see, to take, to taste ,to spit