1)SELECT name, size

FROM sys.master_files

WHERE database_id = DB_ID(N'tempdb');

2)Try Make database recovery mode to Simple.

3) Right Click Datbase =>Tasks =>Shrinks =>Files => Log => select shrink action => Realease unused space.

select shrink action => select in MB

4) SELECT name, size

FROM sys.master_files

WHERE database_id = DB_ID(N'tempdb');

check size...