将下列句子改为现在完成时态1 mr liu became a teacher in 2000mr liu ___ ___

1 mr liu became a teacher in 2000
mr liu _has__ been____ a teacher for __10(ten)___ __years_____
2 my grandpa died in 2002
my grandpa __has_ _been___ _____dead for _ 8(eight)____ __years___
3 i bought a pen last year
i __have___ _had______ a pen for _2___ years___

1 mr liu became a teacher in 2000
mr liu _have became__ ____ a teacher for ___one year.__ _______
2 my grandpa died in 2002
my grandpa ___has died ____ _____ for ____10_ __years.___
3 i bought a pen last year
i __have bought___ _______ a pen for __one year.__ __ ___

1has became,ten years
2has been dead,eight years
3have had,one year

1、 has been， ten years
2、 has been died， eight years
3、have bought ， one year