Abstract:
The objective of this research was to find out the effect of Task-Based Language
Teaching (TBLT) on students’ achievement grammar Conditional Sentence. This
research was conducted at SMK Swasta Satrya Budi 1 Perdagangan, Jalan
Sangnawaluh No. 100 Perdagangan academic year 2016/2017. The sample in this
research has been taken X-TKR 1, the total of the students were 25 and X-TKR 2 ,
the total of the students were 25. The sample consisted of 50 students were taken
by using random sampling technique. The sample was divided into 2 classes, the
experimental group which consisted of 25 students taugt by using TBLT and the
control group consisted of 25 students without TBLT. The instrument of this
research were 50 items of multiple choice. The data were analyzed by using t-test
formula. Then, the result showed that tobserve (8.96) was higher than ttable (2.01) and
the degree of freedom (df = 48) for two-tailed test (8.96 ˃2.01). It meant that the
null hypothesis (Ho) was rejected and alternative hypothesis (Ha) was accepted.
In conclusion, the students’ achievement grammar Conditional Sentence in
grammar by using TBLT was more significant than without TBLT
