Can you help me with something

They forgot to water the plants, so they dried up

They forgot to water, so the plants dried up.

I like the idea of: So, they forgot the water to the dried up plants. Last week, the same idiots forgot the keys to the horse stables and the pouch containing the can opener to the dog food. If they forget one more thing, they are going to find themselves on the unemployment line.

they forgot to water , so the plants dried up. nah confusing...

The plants forgot the water, so they dried up. Drat, that's missing the 'to'. It's almost certainly supposed to be two 'they's and only one 'the'.

The closest I can get that is different from other comments is: The plants forgot the water, so they dried up *too* This uses too rather than to. Also doesn’t really make much sense because I don’t think plants can forget

The water forgot to, so they dried up the plants? The plants dried up to the water, so they forgot? /j

Well for sure this isn't meant to be the answer, but: "The dried up plants forgot, so to the water they." Which would be a horrible sentence to express that having forgotten about the dried up plants, they went swimming.

The plants forgot the water so they dried up. It is a somewhat stupid sentence but grammatically correct.

To the dried up plants: They forgot the water so.......

They so forgot to water the dried up plants.

I agree that one of the "the"s was probably supposed to be a second "they". The only options I can come up with that use all and only the given words are unlikely, but could sort of make sense in unusual contexts: * "The water dried up to the plants, so they forgot." Because the water dried up all the way to the plants, they forgot something (such as, perhaps, that there was still water among the plants). * "They dried the plants up to the water, so forgot." Either they forgot something as a result of having dried the plants up to the water (to a shore or river bank? to a line beneath which the plants were in water?), or based on the fact that they dried the plants to that point it's clear that they forgot something. * "The plants dried up to the water, so they forgot." The plants dried up to the edge of some water (perhaps a pond or stream), which either makes it clear that they forgot something (such as to water) or caused them to forget something. Or perhaps the plants are the "they" that forgot something.

"They forgot to water the plants, so the plants dried up." It's a really stilted way to phrase the sentence but it's the only way to do it using all the words I think.

I believe along with the rest here that either there's a word missing or the first word is supposed to be "they" instead of "the", and your teacher is, for whatever reason, incapable of admitting they made a mistake (which in my opinion makes them a bad teacher).

That looks to me like a word is missing. It's probably meant to be something like "The [man/woman/child/etc] forgot to water the plants, so they dried up".

“They forgot to water the so dried up plants” is as close as I can get, but this just doesn’t sound like a natural sentence to me