1a. Since now tin fish could be stored and refilled.
1b. Since then tin fish could be stored and refilled.
2a. Because from this time it has been possible to store tin fish.
2b. Because of this time it has been possible to store tin fish.
2c. Because off this time it has been possible to store tin fish.
Please correct the above and comment.
Thanks.
“since now” has no logic. It should be “from now” or ‘(ever) since then’.
‘refilled’ would npt be appropriate here. You cannot refill a fish.
1a. From now tinned fish can be stored.
1b. Since then tinned fish could be stored.
2a. From this time it is ipossible to store tinned fish.
2b. Because of this, it is possible to store tinned fish.
2c. Because of this, it has been possible to store tinned fish.