來(lái)源:網(wǎng)絡(luò)資源 2022-12-07 17:32:57
動(dòng)詞加ing做謂語(yǔ)情況
做謂語(yǔ)時(shí)動(dòng)詞加ing前面必須加上be動(dòng)詞,形成be+動(dòng)詞ing(現(xiàn)在分詞)作句子謂語(yǔ),構(gòu)成進(jìn)行時(shí)態(tài)句子。例如:He is reading a book now.他正在看書.He was watching TV when his mother came in.他媽媽進(jìn)來(lái)時(shí),他正在看電視。
They've been waiting for you for three hours.他們等你三個(gè)小時(shí)了.
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