D. Write true sentences, using am/ am not/ is/ isn’t/ are/ aren’t. 1. (I/ 19 years old) I am 19 years old. / I am not 19 years old. 2. (I/ afraid of dogs) __________________________________. 3. (Canada/ a big country) __________________________________. 4. (my teacher/ young) __________________________________. 5. (it/ hot today) __________________________________.26 6. (I/ hungry) __________________________________.

$2.$ I am afraid of dogs $/$ I am not afraid of dogs.

$3.$ Canada is a big country $/$ Canada is not a big country.

$4.$ My teacher is young $/$ My teacher is not young.

$5.$ It is hot today $/$ It is not hot today.

$6.$ I am hungry $/$ I am not hungry.

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*Cấu trúc: Thì hiện tại đơn với động từ tobe

$(+)$ S + am (I) $/$ is (He, She, It, Danh từ số ít) $/$ are (You, We, They, Danh từ số nhiều) + $...$

$(-)$ S + am (I) $/$ is (He, She, It, Danh từ số ít) $/$ are (You, We, They, Danh từ số nhiều) + not + $...$

$(?)$ Am (I) $/$ Is (He, She, It, Danh từ số ít) $/$ Are (You, We, They, Danh từ số nhiều) + S + $...$ + $?$