Mathilde.
New member
- Joined
- Oct 30, 2020
- Member Type
- Student or Learner
- Native Language
- French
- Home Country
- France
- Current Location
- France
For an essay, I'm trying to express the idea that protocells - which may have appeared 4 billions years ago but don't exist anymore - were not able to do something (we are very sure of that).
My sentence is for now : "However, these constructions cannot have permit metabolism andreproduction."
I'm struggling with cannot/couldn't : Can isn't more final ? Or do I have to use could with the past tense ?
My sentence is for now : "However, these constructions cannot have permit metabolism andreproduction."
I'm struggling with cannot/couldn't : Can isn't more final ? Or do I have to use could with the past tense ?
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