Final answer:
The sentence 'They help to build foundation skills in two programmes' can be rewritten in the past continuous tense as 'They were helping to build foundation skills in two programmes.'
Step-by-step explanation:
The sentence 'They help to build foundation skills in two programmes' can be rewritten in the past continuous tense as 'They were helping to build foundation skills in two programmes.' In the past continuous tense, we use the past tense of the verb 'to be' (were) followed by the present participle form of the main verb (helping). The past continuous tense is used to describe an ongoing action in the past. For example, 'They were helping to build foundation skills in two programmes while the professor was giving a lecture.'
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