I guess you tried to translate adjective and subject into Latin. Although they derive from Latin, your translation is not correct. You may want to use this dictionary.
PS
Per longum tempus → Longe (more elegant)
concurrant —> Wrong. See example in Smith at the end of the voice “agree”
In general, it is too early for you to discuss grammar in Latin. You should start with something easier. I recommend you join the conversation about the weather in the Agora.
What’s the weather today? (Latine)