Adective or Verb - 아/어서 tense markers like 았/었 and 겠 cannot come before 아/어서 Noun 때문에 Adective/Verb-기 때문에 This is more literary. Tense markers can come before it And neither can be used for commands or suggestions~

때문에 = because of 아/어 해서 = because I/you/we/they/she/he (verb)