In contrast with German, the English language requires designation of ongoing activities by appending "ing" to the verb, as in "he was running into the end zone when he dropped the football" or "I am teaching writing". Notice that a form of "is" is used as a helping verb; thus, constructions like "I do teaching writing" are ungrammatical.
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In contrast with German, the English language requires designation of ongoing activities by appending "ing" to the verb, as in "he was running into the end zone when he dropped the football" or "I am teaching writing". Notice that a form of the verb "to be" is used as a helping verb; thus, constructions like "I do teaching writing" are ungrammatical.