Mặc dù + sub clause + (nhưng/song) + main clause Although + sub clause + “,” + (but) + main clause Main clause + mặc dù + sub clause Main clause + “,” + although + sub clause Main clause + “(“ + mặc dù + sub clause + “)” Main clause + “(“ although + sub clause “)” Subject of main clause + mặc dù + sub clause + predicate of main clause Main clause + “-” + although + sub clause Mặc dù + sub clause, S ellipted + (nhưng/song) + main clause S of main clause + “,” + although + sub clause + “,” + predicate of main clause S of main clause + mặc dù + sub clause, S ellipted + predicate of main clause Although + PP phrase + “,” + main clause. Main clause + mặc dù + sub clause, S ellipted S of main clause + “,” + although + PP phrase + “,” + predicate of main clause. S of main clause + mặc dù + AP + predicate of main clause Main clause + “,” + although + PP phrase. Main clause + mặc dù + AP Although + noun phrase + “,” + main clause. Mặc dù + sub clause + (nhưng/song) + main clause, S ellipted S of main clause + “,” + although + NP + “,” + predicate of main clause. Mặc dù + sub clause, S ellipted + (nhưng/song) + main clause, S ellipted Although + PreP phrase + “,” + main clause. Main clause + mặc dù + AdvP S of main clause + “,” + although + PreP phrase + “,” + predicate of main clause. Main clause + mặc dù + negative phrase Subject of main clause + “,” + although + AP + “,” + predicate of main clause. S of sub clause + mặc dù + predicate of sub clause + main clause Main clause + “,” + although + AP. Mặc dù thế + main clause Main clause + “,” + although + AdvP. Mặc dù + sub clause + (nhưng/song) + complex sentence Main clause + “,” + although + ‘not’ phrase. Mặc dù + sub clause, S ellipted + (nhưng/song) + complex sentence Although + complex sentence + (but) + main clause Mặc dù + complex sentence + (nhưng/song) + main clause Main clause + mặc dù + complex sentence Mặc dù + complex sentence + (nhưng/song) + complex sentence Mặc dù + sub clause + “.” Figure 3. Identifying the equivalent structures between ‘although’ and ‘mặc dù’ sentences