Abstract:
The purpose of the research was to study a use of sentences of five to six year old in 3 types such as simple sentences, compound sentences and complex sentences and study the way of using sentences in 4 types as declarative sentences, negative sentences, interrogative sentences and imparative sentences. The samples were sixty-six preschoolers at the age of five to six in schools of Office of Private Education Commission, Office of Bangkok Primary Education Commission and Office of Bangkok Education Commission. The data collection was 12 weeks. The research instrument was observation record form. The research findings were as follows: 1. Five to six year old children in Bangkok Metropolis used 87.34 percent of simple sentences, 9.29 percent of compound sentences and 3.36 percent of complex sentences respectively. 2. Five to six year old children in Bangkok Metropolis used 76.07 percent of declarative sentences, 8.63 percent of imparative sentences, 8.12 percent of interrogative sentences and 7.17 percent of negative sentences respectively.