Grammar.Making questions.
Are these questions written correctly?Check please.

a) Ann is learning Italian.
(how long/she/learn/Italian?) _How long has she learnt Italian?_
(when/she/begin/learning Italian?) _When did she begin learning Italian?_
b) I know Tom.
(how long/you/know/Tom?) _How long do you know Tom?_ or How long have you known Tom?
(when/you/first/meet/Tom?) _When did you first meet Tom?_
c) Bob and Alice are married.
(how long/they/be/married?) How long have they been married?_
(when/they/get/married?) _When did they get married?_
d) Tom is ill.
(how long/he/be/ill?) _How long has he been ill?_
(when/he/become/ill?) _When did he become ill?_
e) Jim has a beard.
(how long/he/have/a beard?) How long has he have a beard?_
(when/he/grow/it?) _When did he grow it?_

Question

Grammar.Making questions.
Are these questions written correctly?Check please.

a) Ann is learning Italian.
(how long/she/learn/Italian?) _How long has she learnt Italian?_
(when/she/begin/learning Italian?) _When did she begin learning Italian?_
b) I know Tom.
(how long/you/know/Tom?) _How long do you know Tom?_ or How long have you known Tom? 
(when/you/first/meet/Tom?) _When did you first meet Tom?_
c) Bob and Alice are married.
(how long/they/be/married?) How long have they been married?_
(when/they/get/married?) _When did they get married?_
d) Tom is ill.
(how long/he/be/ill?) _How long has he been ill?_
(when/he/become/ill?) _When did he become ill?_
e) Jim has a beard.
(how long/he/have/a beard?) How long has he have a beard?_
(when/he/grow/it?) _When did he grow it?_

Answer

For A you should say "How long has she been learning Italian?" since she's still learning.

For B you should choose "How long have you known Tom?"

Otherwise they're all good. Great work!

Answer

a) Ann is learning Italian.
(how long/she/learn/Italian?) _How long has she learnt Italian?_ (This one needs to be HOW LONG HAS SHE BEEN LEARNING? It is an incomplete process and still going on now)
(when/she/begin/learning Italian?) _When did she begin learning Italian?_
b) I know Tom.
(how long/you/know/Tom?) _How long do you know Tom?(WRONG)_ or How long have you known Tom?  (GOOD)
(when/you/first/meet/Tom?) _When did you first meet Tom?_
c) Bob and Alice are married.
(how long/they/be/married?) How long have they been married?_
(when/they/get/married?) _When did they get married?_
d) Tom is ill.
(how long/he/be/ill?) _How long has he been ill?_
(when/he/become/ill?) _When did he become ill?_
e) Jim has a beard.
(how long/he/have/a beard?) How long has he have a beard?_ (HAD not HAVE)
(when/he/grow/it?) _When did he grow it?_