To enter primary school in Singapore, you will need to go through the Admissions Exercise for International Students (AEIS). This is a standardized test designed to assess your English proficiency and other subjects like Mathematics. The test is conducted by the Singapore Ministry of Education.

For English, the AEIS exam typically covers basic language skills such as reading comprehension, vocabulary, grammar, and writing. You can prepare for this exam by practicing English exercises, reading English books, and improving your listening and speaking skills. It's also helpful to take English classes or use online resources to enhance your knowledge of the language.