Re: I remember to lock the door vs I remember locking the door
"I have to ..." does not refer to present tense; it is present tense.The speaker has a present/general obligation. What the speaker is obliged to do will occur in the future.
Originally Posted by Babai
I am locking the door, because I have to lock the door. Present tense, - present/general obligation - present-time act of locking.
When I go out later, I will lock the door, because I have to lock the door. -Present tense - present/general obligation - future-time act of locking.
Please do not edit your question after it has received a response. Such editing can make the response hard for others to understand.