I've been meaning to write you a letter but I haven't got around to it.
 get around to something find time to do something這是正統的美語說法. 注意：是 get around to doing something 不是 get around to do something
老師 (讓小朋友出校車後): 別嬉戲，別跟陌生人說話。 (請填空)
Teacher (after letting kids out of the school bus on a field trip): No horsplay. Don't talk to strangers.