Many foreign speakers have trouble with word endings. The “ING” ending is commonly used. I hear foreign speakers pronounce the “ING” as: “INK”, “IN”, “ENG”, “EENG” or “IN GA”.
When mispronounced, the word sing would sound like sink, sin, seng or sin ga (which might be interpreted as singer). When “ING” is added to a verb to change the tense, the word thinking would sound like thinkin or thinkeeng.
To correct this error, do these things:
- make the vowel short
- make the NG one sound
- say NG not N. Do this by touching the tip of the tongue to the back of the bottom, front teeth; NOT the top teeth.
Good luck! People will notice a difference.