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She opened the door a crack.

1. Is the above natural?
2. What is another way to express the same idea?
Thanks
Comments  
She opened the door a crack.

1. Is the above natural? - No
2. What is another way to express the same idea? - She opened the door ajar.
Thanks, Optilang.
Students: We have free audio pronunciation exercises.
That is 100% natural in American English.
Thanks, GG.
Both of these would work. See Google Books hits:
751 on "opened the door a crack"
614 on "cracked the door open"
Students: Are you brave enough to let our tutors analyse your pronunciation?
Hi guys,
How about simply -

She opened the door a little.
She opened the door just a little.

Best wishes, Clive