The difference between Ha' and Ta' Marbuta is one of the most common mistakes learners make. The Ha' remains constant in pronunciation, while the Ta' Marbuta changes in pronunciation between stops and connected, making the distinction between them an essential step in mastering Arabic writing.
Tanween is a phonetic mark added to the end of a noun, and it comes in the form of two dhammahs, two kasrahs, or two fathahs. Each type has its own writing rule: dhammah above the letter, kasrah below it, and fathah on the alif, except for some exceptions such as the ta marbuta and the hamza on the line.
Avoiding spelling mistakes isn't difficult. Just review what you're writing, remember basic Arabic grammar rules, and practice reading to write clearly and correctly.
