This consists of 1-page explanation and 3-part exercise. A prior explanation about difference between "Present Perfect" and "Simple Past" is needed. In part A, students have to fill in the blanks with "for" or "since". In part B, students should make present perfect sentences in negative form. In part C, students have to make sentences using both "when..?" and "how long..?".

when-and-how-long-grammar-drills_74380.doc

"When...?" and "How long...?"

when-and-how-long

Let's do English ESL general grammar practice. This consists of 1-page explanation and 3-part exercise. A prior explanation about difference between "Present Pe…